1523, 1524 Reference Thermometer Technical Guide · 1523, 1524 Reference Thermometer Technical...

1523, 1524Reference Thermometer

Technical Guide

Revision 892401

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Fluke Corporation, Hart Scientific Division799 E. Utah Valley Drive • American Fork, UT 84003-9775 • USAPhone: +1.801.763.1600 • Telefax: +1.801.763.1010E-mail: [email protected] subject to change without notice. • Copyright © 2008 • Printed in USA

Limited Warranty & Limitation of LiabilityEach product from Fluke Corporation, Hart Scientific Division (“Hart”) is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is one year(s) for the Reference Thermometer. The warranty period begins on the date of the shipment. Parts, product repairs, and services are warranted for 90 days. The warranty extends only to the original buyer or end-user customer of a Hart authorized reseller, and does not apply to fuses, disposable batteries or to any other product, which in Hart’s opinion, has been misused, altered, neglected, or damaged by accident or abnormal conditions of operation or handling. Hart warrants that software will operate substantially in accordance with its functional specifica-tions for 90 days and that it has been properly recorded on non-defective media. Hart does not warrant that software will be error free or operate without interruption. Hart does not warrant calibrations on the Reference Thermometer.

Hart authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different warranty on behalf of Hart. Warranty support is available if product is purchased through a Hart authorized sales outlet or Buyer has paid the applicable international price. Hart reserves the right to invoice Buyer for importation costs of repairs/replacement parts when product purchased in one country is submit-ted for repair in another country.

Hart’s warranty obligation is limited, at Hart’s option, to refund of the purchase price, free of charge repair, or replacement of a defective product which is returned to a Hart authorized ser-vice center within the warranty period.

To obtain warranty service, contact your nearest Hart authorized service center or send the prod-uct, with a description of the difficulty, postage, and insurance prepaid (FOB Destination), to the nearest Hart authorized service center. Hart assumes no risk for damage in transit. Following warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destina-tion). If Hart determines that the failure was caused by misuse, alteration, accident or abnormal condition or operation or handling, Hart will provide an estimate or repair costs and obtain authorization before commencing the work. Following repair, the product will be returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges (FOB Shipping Point).

THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICU-LAR PURPOSE. HART SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCI-DENTAL. OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, WHETHER ARISING FROM BREACH OF WARRANTY OR BASED ON CONTRACT, TORT, RELIANCE OR ANY OTHER THEORY.

Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or limitation of incidental or consequential damages, the limitations and exclusions of this warranty may not apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court of competent jurisdiction, such holding will not affect the validity or enforceability of any other provision.

iii

Table of Contents

1 Before You Start .......................................................................11.1 Introduction ............................................................................................... 11.2 Standard Equipment ................................................................................. 11.3 Safety Information ..................................................................................... 1

1.3.1 Warning .....................................................................................................11.3.2 Cautions ..........................................................................................................2

1.4 CE Comments ........................................................................................... 31.4.1 EMC Directive .................................................................................................31.4.2 Immunity Testing .............................................................................................3

1.4.2.1 For Use As a Portable (Hand-held) Instrument ...................................................... 31.4.2.2 For Use As a Benchtop Instrument (AC Adapter) .................................................. 4

1.5 Using Clamp-On Ferrites .......................................................................... 41.6 Emissions Testing ..................................................................................... 41.7 Low Voltage Directive (Safety) .................................................................. 41.8 Authorized Service Centers ...................................................................... 4

2 Quick Start ................................................................................72.1 Setup ......................................................................................................... 72.2 Specifications ........................................................................................ 17

3 General Operation .................................................................233.1 Battery..................................................................................................... 233.2 DC Power Source ................................................................................... 233.3 Probe ...................................................................................................... 24

3.3.1 Internal or External reference junction compensation may be used with this instrument. ................................................................................................................253.3.2 TC Internal Reference Junction .....................................................................253.3.3 TC External Reference Junction ....................................................................25

3.4 Probe Lock Function ............................................................................... 253.5 INFO-CON Connector ............................................................................. 26

4 Display Functions and User Interface ..................................294.1 Main Screen ............................................................................................ 294.2 STATS ...................................................................................................... 294.3 °C °F ....................................................................................................... 294.4 HOLD ...................................................................................................... 29

1523, 1524 Reference Thermometer

iv

4.5 SETUP ..................................................................................................... 304.5.1 Channel T1 ....................................................................................................30

4.5.1.1 Probe .................................................................................................................... 304.5.1.2 Config ................................................................................................................... 304.5.1.3 Base X .................................................................................................................. 304.5.1.4 Aux Displ .............................................................................................................. 304.5.1.5 Temp Res .............................................................................................................. 314.5.1.6 RJ ......................................................................................................................... 31

4.5.2 Channel T2 (1524 Only) ................................................................................314.5.2.1 Probe .................................................................................................................... 324.5.2.2 Config ................................................................................................................... 324.5.2.3 Base X .................................................................................................................. 324.5.2.4 Aux Displ .............................................................................................................. 324.5.2.5 Temp Res .............................................................................................................. 33

4.5.3 Instrument .....................................................................................................334.5.3.1 Fast Scan Mode ................................................................................................... 334.5.3.2 Contrast ................................................................................................................ 334.5.3.3 Auto-Off ................................................................................................................ 334.5.3.4 Backlight Time ...................................................................................................... 334.5.3.5 Serial Port ............................................................................................................. 334.5.3.6 Baud Rate ............................................................................................................. 344.5.3.7 Date/Time ............................................................................................................. 34

4.6 SAVE ....................................................................................................... 344.7 ARROWS, UP, DOWN ............................................................................. 344.8 ENTER ..................................................................................................... 354.9 RECALL .................................................................................................. 35

4.9.1 Review Saved ................................................................................................354.9.2 Send Saved ...................................................................................................354.9.3 Delete Saved .................................................................................................354.9.4 Send Logs .....................................................................................................354.9.5 Delete Logs ...................................................................................................36

4.10 NEXT ....................................................................................................... 364.11 SHIFT ...................................................................................................... 364.12 RESET ..................................................................................................... 364.13 Ω mV ....................................................................................................... 364.14 TREND .................................................................................................... 364.15 LOG ........................................................................................................ 37

4.15.1 Free ...............................................................................................................374.15.2 Interval ...........................................................................................................374.15.3 Tag .................................................................................................................384.15.4 Session ..........................................................................................................38

v

4.16 HOME ..................................................................................................... 38

5 LOGS .......................................................................................395.1 DEMAND LOG ........................................................................................ 395.2 AUTO-LOG ............................................................................................. 39

5.2.1 Auto-Log Operation .......................................................................................395.2.2 Sending Auto Log Data to a Computer .........................................................415.2.3 Data Upload Format ......................................................................................415.2.4 Deleting Auto Log Data .................................................................................41

6 Digital Communication Interface ..........................................436.1 Wiring ...................................................................................................... 43

6.1.1 Setup .............................................................................................................446.1.2 Serial Operation ............................................................................................446.1.3 Data Upload Format .....................................................................................44

6.2 Command Syntax ................................................................................... 446.3 Serial Commands by Function or Group ................................................ 456.4 Serial Commands - Alphabetic Listing ................................................... 48

7 Calibration of Your Reference Thermometer Readout ........777.1 General ................................................................................................... 777.2 Introduction ............................................................................................. 777.3 Terminology............................................................................................. 777.4 Fundamentals ......................................................................................... 777.5 Environmental Test Conditions ................................................................ 777.6 Calibration Equipment ............................................................................ 777.7 Manual Calibration .................................................................................. 78

7.7.1 General ..........................................................................................................787.7.2 As Found Data Procedure .............................................................................80

7.7.2.1 As Found Calibration Parameters ........................................................................ 807.7.2.2 As Found Data ...................................................................................................... 80

7.7.3 Alignment Procedure.....................................................................................807.7.3.1 Alignment Test Data ............................................................................................. 807.7.3.2 Calculate New Adjustment Values ....................................................................... 80

7.7.4 As Left Data ...................................................................................................80

7.8 Preparation for Reference Thermometer Calibration .............................. 807.8.1 Serial Communication ...................................................................................807.8.2 Cabling .........................................................................................................817.8.3 Scan Mode ....................................................................................................81


vi

7.8.4 AC Adapter ...................................................................................................81

7.9 Manual Calibration Process .................................................................... 817.9.1 Procedure ......................................................................................................82

7.9.1.1 Visual Inspection .................................................................................................. 827.9.1.2 1523/24 Calibration Parameters (As Found) ........................................................ 827.9.1.3 1523/24 Accuracy Test (As Found) ...................................................................... 84

7.9.2 1523/24 Alignment ........................................................................................897.9.2.1 L75_OHMS Range ................................................................................................ 917.9.2.2 LO_OHMS Range ................................................................................................. 927.9.2.3 MED_OHMS Range .............................................................................................. 927.9.2.4 HI_OHMS Range .................................................................................................. 927.9.2.5 Millivolt Range ...................................................................................................... 92

7.9.3 1523/24 As Left Test Data .............................................................................93

8 Troubleshooting .....................................................................95

9 Maintenance ...........................................................................97

Index ...............................................................................................99

vii

FiguresFigure 1 Clamp-On Ferrite ................................................................................. 4Figure 2 Input/Output Connections - 1523 ........................................................ 7Figure 3 Input/Output Connections - 1524 ........................................................ 8Figure 4 Keys ..................................................................................................... 9Figure 5 1523 Menu ......................................................................................... 11Figure 6 1523 Menu (cont) ............................................................................. 11Figure 7 1523 Menu (cont) ............................................................................. 12Figure 8 1524 Menu ........................................................................................ 14Figure 9 1524 Menu (cont) ............................................................................. 14Figure 10 1524 Menu (cont) ........................................................................... 15Figure 11 1524 Menu (cont) ........................................................................... 16Figure 12 1524 Menu (cont) ........................................................................... 17Figure 13 1524 Menu (cont) ........................................................................... 17Figure 14 12V DC Power source Polarity ........................................................ 24Figure 15 Probe wiring diagrams..................................................................... 27Figure 16 RS-232 wiring .................................................................................. 43Figure 17 Flow chart for manual calibration .................................................... 79


viii

TablesTable 1 International Symbols ............................................................................ 3Table 2 1523 Input/Output Connections ............................................................ 7Table 3 1524 Input/Output Connections ............................................................ 8Table 4 1523 Key Functions ............................................................................. 10Table 5 1524 Key Functions ............................................................................. 12Table 6 Table 6 General Specifications .......................................................... 18Table 7 Table 7 Millivolt Measurement ............................................................. 18Table 8 Reference Junction Compensation ..................................................... 18Table 9 Table 8 Ohms Measurement, RTDs .................................................... 18Table 10 Table 9 Ohms Measurement, Thermistor ......................................... 19Table 11 Equivalent temperature accuracies derived from primary specifications (Ω, mV) ............................................................................ 19Table 12 Temperature, Thermocouples External Reference Junction ............. 20Table 13 Temperature, RTD Ranges and Accuracies (RTD-90) ...................... 21Table 14 Temperature, Thermistor ................................................................... 21Table 15 Fast Scan Mode Specifications ........................................................ 21Table 16 Sample Interval per Channel in Seconds .......................................... 21Table 17 Channel to Channel Differential Specifications ................................ 22Table 18 Commands by Function or Group ..................................................... 45Table 19 Statistical Types ................................................................................ 72Table 20 Probe Conversion Types ................................................................... 72Table 21 Probe Characterization Parameters .................................................. 73Table 22 Calibration Range Identifiers ............................................................. 74Table 23 Demand Log Statistical Types .......................................................... 75Table 24 Error Messages ................................................................................. 75Table 25 Test Equipment Specifications .......................................................... 78Table 26 Standard Reference Resistor Specification ...................................... 78Table 27 Standard Voltage Reference Specification ....................................... 78Table 28 1523/24 Accuracy Test Settings and Specifications ......................... 81Table 29 1523/24 Accuracy Test Settings and Specifications – Voltage ......... 82Table 30 As Found Readout/Calibration Parameter Settings .......................... 82Table 31 1523/24 Alignment Settings .............................................................. 89

1

Before You StartSafety Information

Before You Start1

Introduction1.1 The Reference Thermometers (1523, 1524) are designed to be reliable, stable, tem-perature measuring instruments that can be used in the field or laboratory. They offer accuracy, portability, and speed for nearly every field calibration application. The instruments have been designed with the field user in mind and are easy to use while maintaining stability, uniformity, and accuracy comparable to some laboratory instru-ments. Your Fluke 1523 and 1524 thermometers are a handheld, battery operated instrument that measures temperature using Platinum resistance Thermometers (PRT), Thermistors, and Thermocouples (TC).

1.2 Standard EquipmentUnpack the instrument carefully and inspect it for any damage that may have occurred during shipment. If there is shipping damage, notify the carrier immediately.

Verify that the following components are present:

1523/1524 Reference Thermometer with 3 AA batteries

AC Adapter, with power cord

RS-232 Cable

User’s Guide

Documentation CD

Report of Calibration and calibration label

Clamp-on ferrite(s)

If all items are not present, contact an Authorized Service Center. (See Section 1.8, Authorized Service Centers on page 4.)

1.3 Safety InformationThe Reference Thermometer is designed in accordance with EN 61010-1 2nd Edi-tion, and CAN/CSA 22.2 No 61010.1-04. Use this instrument only as specified in this manual, otherwise the protection provided by the instrument may be impaired.

A Warning identifies conditions and actions that pose hazard(s) to the user; a Caution identifies conditions and actions that may damage the instrument being used.

International symbols used on the reference thermometer and in this manual are ex-plained in Table 1 on page 3.

1.3.1 WarningTo avoid possible electric shock or personal injury:

Do not use the reference thermometer in environments other than those listed in

the user’s guide.

1523, 1524 Reference ThermometerSafety Information

2

Do not use the reference thermometer for any application other than that which

is specified. The instrument was designed for temperature measurement and calibration. Any other use of the instrument may cause unknown hazards to the user.If the reference thermometer is used in a manner not in accordance with the

equipment design, the operation and the protection provided by the instrument may be impaired. In addition, safety hazards may arise.Do not apply more than the rated voltage, as marked on the reference

thermometer, between the inputs, or between any input and earth ground (30 V, 24 mA max all terminals).Follow all equipment safety procedures.

Calibration equipment should only be used by trained personnel.

The reference thermometer is intended for indoor use only.

Before you use the instrument, inspect the case. Look for cracks or missing

plastic. Pay particular attention to the insulation surrounding the connectors. Do not use the reference thermometer if it appears damaged or operates abnormally. Protection may be impaired. When in doubt, have the instrument serviced.Always use an isolated RTD or PRT (metal sheath isolated from lead wires).

Make sure the battery door is closed and latched before you operate the

reference thermometer.Do not operate the reference thermometer around explosive gas, vapor, or dust.

For battery operation use only 3 AA batteries, properly installed in the reference

thermometer case.On the 1524 model, thermocouples can only be used on channel 1.

Cautions1.3.2 To avoid possible damage to the reference thermometer or to equipment under test:

Do not apply more than the rated voltage, as marked on the reference

thermometer, between the inputs, or between any input and earth ground (30 V 24 mA max all terminals).Unless recalibrating the instrument DO NOT change the values of the

calibration constants from the factory set values. The correct setting of these parameters is important to the safety and proper operation of the instrument.The instrument and any thermometer probes used with it are sensitive

instruments that can be easily damaged. Always handle these devices with care. DO NOT allow them to be dropped, struck, stressed, or overheated.DO NOT operate this instrument in an excessively wet, oily, dusty, or dirty

environment.Use the proper probes, function and range for your measurement.

Ensure probe coefficients are downloaded.

3

Before You StartCE Comments

International SymbolsTable 1

Symbol Description Symbol Description

AC (Alternating Current) PE Ground

AC-DC Hot Surface (Burn Hazard)

Battery Read the User’s Guide (Important Information)

Complies with European Union directives Off

DC On

Double Insulated Canadian Standards Association

Electric Shock C-TICK Australian EMC mark

FuseThe European Waste Electrical and Electronic Equipment (WEEE) Directive (2002/96/EC) mark.

CE Comments1.4

EMC Directive1.4.1 Hart Scientific’s equipment has been tested to meet the European Electromagnetic Compatibility Directive (EMC Directive, 2004/108/EC ). The Declaration of Confor-mity for your instrument lists the specific standards to which the unit was tested.

The instrument was designed specifically as a test and measuring device. Compliance to the EMC directive is through EN 61326-1:2006 Electrical equipment for measure-ment, control and laboratory use – EMC requirements

As noted in the EN 61326-1, the instrument can have varying configurations. The instrument was tested in a typical configuration with shielded RS-232 cables.

Immunity Testing1.4.2

For Use As a Portable (Hand-held) Instrument1.4.2.1

The instrument was tested to Basic Immunity Requirements for portable test and mea-surement equipment.

1523, 1524 Reference ThermometerUsing Clamp-On Ferrites

4

For Use As a Benchtop Instrument (AC Adapter)1.4.2.2

The instrument was tested to Immunity Requirements for Controlled EM Environ-ments. Utilized in this state the instrument is designed to operate in a controlled electromagnetic environment. The instrument experiences degradation in the presence of strong fields in the frequency range of 150 to 200 MHz and we suggest that it not be used in close proximity to VHF transmitters.

Using 1.5 Clamp-On FerritesClamp-on ferrites are provided for use in improving the instrument’s electromagnetic (EM) immunity in environments of excessive EM interference, like areas of heavy industrial equipment. We recommend placing the ferrites on the cables of probes at-tached to the instrument.

To attach a ferrite to a probe cable, make a loop in the cable near the connector and clamp the ferrite around half of the loop as shown in the diagram. The ferrite can be easily detached and moved to a new probe when needed. (See Figure 1 on this page.)

Figure 1

clamp-on ferrite

probe cable

Clamp-On Ferrite

Emissions Testing1.6 The instrument fulfills the limit requirements for Class B.

Low Voltage Directive (Safety)1.7 In order to comply with the European Low Voltage Directive (2006/95/EC), Fluke equipment has been designed to meet the EN 61010-1.

1.8 Authorized Service CentersPlease contact one of the following authorized Service Center to coordinate service on your Fluke product:

Fluke CorporationHart Scientific DivisionPhone: +1.801.763.1600

5

Before You StartAuthorized Service Centers

Fluke Nederland B.V.Phone: +31-402-675300

Fluke Int’l Corporation - CHINAPhone: +86-10-6-512-3436

Fluke South East Asia Pte Ltd. - SINGAPOREPhone: +65-6799-5588

When contacting a Service Center for support, please have the following information available:

Model Number

Serial Number

Complete description of the problem

7

Quick StartSetup

Quick Start2

Setup2.1

SAVE

NEXT

HOME

ENTER

RESET TREND

RECALL

HOLDSTATS °C °F

SETUP

mV

RS232 12 V DC30 V MAX

1523 CALIBRATIONTHERMOMETERREADOUT

Figure 2 Input/Output Connections - 1523

1523 Input/Output ConnectionsTable 2

No. Name Description

1 Serial Serial interface connector

2 Connector, T1 Sensor Connector, Channel 1

4 Power External Power adapter connection

1523, 1524 Reference ThermometerSetup

8SAVE

NEXT

HOMELOG

RESET

ENTER

RECALL

HOLDSTATS °C °F

SETUP

TRENDmV


T1 T2


Figure 3 Input/Output Connections - 1524

1524 Input/Output ConnectionsTable 3

No Name Description

1 Serial Serial interface connector



4 Power External Power adapter connection

9

Quick StartSetup

SAVE

NEXT

HOMELOG

RESET

ENTER

RECALL

HOLDSTATS °C °F

SETUP

TRENDmV


T1 T2


1

10

11

4

32

5 6

7

8

9

12

Figure 4 Keys


10

1523 Key FunctionsTable 4 No Key Description

1 Power on or off

2 Yellow Second or Special Function Key

3 Turns the backlight on or off

4 STATS 1st Press: MAX, 2nd Press: MIn, 3rd Press: AVE, 4th Press: STD DEV

5 °C °F Units, °C/°F

6 HOLD 1st press - Holds value on screen "-- HOLD --" across bottom of screen. 2nd press - Releases Screen hold.

7 SETUP Enters setup menu, see menu structure

8 SAVE Saves measurement as a logged data point

9 Arrows increment or decrement selections in an active field. In Graph Mode, Arrows change the scale of the graph.

10 ENTER Selects highlighted selection, Saves a new selection.

11 RECALL 1st Press - Enters Recall menu, 2nd Press - Exits Recall Menu

12 NEXT Moves down to next option on screen.

13

+

STATS “RESET” - Resets Stats Data

14

+

°C °F “Ω mV” - Toggles from °C to Ω or Ω to °C (PRT, thermistor), °C to mV or mV to °C (TC)

15

+

HOLD “TREND” - Starts Graphing data

16

+

ENTER “HOME” Returns user to main screen

11

Quick StartSetup

Figure 5 1523 Menu

Figure 6 1523 Menu (cont)


1524 Key FunctionsTable 5 No Key Description

1 Power on or off

2 Yellow Second or Special Function Key

3 Turns the backlight on or off

4 STATS 1st Press: Max, 2nd Press: Min, 3rd Press: Ave, 4th Press: STD DEV

5 °C °F Units, °C/°F

6 HOLD 1st press - Holds value on screen "-- HOLD --" across bottom of screen. 2nd press - Releases Screen hold.

7 SETUP Enters setup menu, see menu structure

8 SAVE Saves measurement as a logged data point

13

Quick StartSetup

No Key Description

9 Arrows increment or decrement selections in an active field. In Graph Mode, Arrows change the scale of the graph.

10 ENTER Selects highlighted selection, Saves a new selection.

11 RECALL 1st press - Enters Recall Menu, 2nd press - Exits Recall Menu

12 NEXT Moves down to next option on screen.

13

+

STATS “RESET” - Resets Stats Data

14

+

°C °F “Ω mV” - Toggles from °C to Ω or Ω to °C (PRT, thermistor), °C to mV or mV to °C (TC)

15

+

HOLD “TREND” - Starts Graphing data

16

+

SAVE “LOG” - Log a series of measurements, see Auto Log in menu structure

17

+

ENTER “HOME” Returns user to main screen


14

Figure 8 1524 Menu


15

Quick StartSetup



16


17

Quick StartSpecifications



2.2 Specifications Specifications are based on a one year calibration cycle and apply from 13 °C to 33 °C unless stated otherwise. All specifications assume a five minute warm up period

1523, 1524 Reference ThermometerSpecifications

18

Table 6 General Specifications Table 6

Operating Temperature†

–10 °C to 60 °C

Storage Temperature –20 °C to 70 °C

Operating altitude 10,000 meters above mean sea level

Relative Humidity (% RH operating without condensation)

0 % to 90 % (non condensing)

Vibration Random, 2g, 5–500 Hz

Power requirements 3 AA alkaline batteries 12 V dc universal power supply

Size 96 x 200 x 47 mm (3.75 x 7.9 x 1.86 inches)

Weight 0.65 kg (1.4 lb)

Safety EN 61010-1:2001, CAN/CSA C22.2 No. 61010.1-04

†Environmental conditions for all specifications: 13 °C to 33 °C

Table 7 Millivolt MeasurementTable 7

Range Resolution Accuracy

–10 mV to 75 mV 0.001 mV ± (0.005 % + 5 µV)

Temperature Coefficient ( –10 °C to 13 °C, +33 °C to 60 °C):

± (0.001 %/°C + 1 µV/°C)

Reference Junction CompensationTable 8

Thermocouple Reference Junction Compensation Accuracy

± 0.20 C

Table 8 Ohms Measurement, RTDs Table 9

Ohms Range Accuracy ± Ω 4 Wire

0 Ω to 400 Ω ± (0.004 % + 0.002 Ω)

Temperature Coefficient ( –10 °C to 13 °C, +33 °C to 60 °C):

0.0008 %/°C + 0.0004 Ω

Excitation Current: 1 mA

19


Table 9 Ohms Measurement, Thermistor Table 10

Ohms Range Accuracy ± Ω, 4 Wire

200 Ω to 50 kΩ ± (0.01 % + 0.5 Ω)

50 kΩ to 500 kΩ ± (0.03 %)

Temperature Coefficient ( –10 °C to 13 °C , +33 °C to 60 °C):

0.002 %/°C + 0.1 Ω (0 Ω to 50 kΩ)

0.06 %/°C + 0.1 Ω (50 kΩ to 500 kΩ)

Excitation Current: 10 µA (0 Ω to 50 kΩ) 2 µA (50 kΩ to 500 kΩ)

Equivalent temperature accuracies derived from primary Table 11 specifications (Ω, mV)

Type RangeMeasure

Accuracies (ITS-90)

B 600 °C to 800 °C800 °C to 1000 °C1000 °C to 1800 °C

0.85 °C0.68 °C0.57 °C

C 100 °C to 550 °C550 °C to 2300 °C

0.32 °C0.71 °C

E –200 °C to 0 °C0 °C to 950 °C

0.52 °C0.22 °C

J –200 °C to 0 °C0 °C to 1200 °C

0.52 °C0.23 °C

K –200 °C to 0 °C0 °C to 1370 °C

0.61 °C0.24 °C

L –200 °C to 0 °C0 °C to 900 °C

0.36 °C0.23 °C

M –20 °C to 0 °C0 °C to 400 °C

400 °C to 1400 °C

0.26 °C0.25 °C0.22 °C

N –200 °C to 0 °C0 °C to 1300 °C

0.72 °C0.28 °C

R –20 °C to 0 °C0 °C to 500 °C

500 °C to 1750 °C

1.09 °C0.97 °C0.49 °C

S –20 °C to 0 °C0 °C to 500 °C

500 °C to 1750 °C

1.05 °C0.95 °C0.56 °C

T –200 °C to 0 °C0 °C to 400 °C

0.60 °C0.25 °C

U –200 °C to 0 °C0 °C to 400 °C

0.54 °C0.24 °C

Resolution: 0.01 °

Note 1: Accuracies are based on internal Reference Junction Compensation..


20

Temperature, Thermocouples External Reference JunctionTable 12

Type RangeMeasure Accuracies (ITS-90)

B 600 to 800 °C 0.85 °C

800 to 1000 °C 0.68 °C

1000 to 1800 °C 0.57 °C

C 100 to 550 °C 0.32 °C

550 to 2300 °C 0.71 °C

E -200 to 0 °C 0.18 °C

0 to 950 °C 0.09 °C

J -200 to 0 °C 0.21 °C

0 to 1200 °C 0.12 °C

K -200 to 0 °C 0.31 °C

0 to 1370 °C 0.15 °C

L -200 to 0 °C 0.15 °C

0 to 900 °C 0.11 °C

M -20 to 0 °C 0.14 °C

0 to 400 °C 0.14 °C

400 to 1400 °C 0.14 °C

N -200 to 0 °C 0.48 °C

0 to 1300 °C 0.20 °C

R -20 to 0 °C 1.06 °C

0 to 500 °C 0.95 °C

500 to 1750 °C 0.48 °C

S -20 to 0 °C 1.03 °C

0 to 500 °C 0.93 °C

500 to 1750 °C 0.55 °C

T -200 to 0 °C 0.30 °C

0 to 400 °C 0.13 °C

U -200 to 0 °C 0.27 °C

0 to 400 °C 0.13 °C

Resolution: 0.01 °C

Note 1: Accuracies are based on external reference junction compensation.

21


Temperature, RTD Ranges Table 13 and Accuracies (RTD-90)

Accuracy ± °C 4-wire Probe

± 0.011 at -100 °C

± 0.015 at 0 °C

± 0.019 at 100 °C

± 0.023 at 200 °C

± 0.031 at 400 °C

± 0.039 at 600 °C

Resolution: 0.001 °C (0.001 °F)

Temperature, ThermistorTable 14

Accuracy @ °C

± 0.002 at 0 °C

± 0.003 at 25 °C

± 0.006 at 50 °C

± 0.014 at 75 °C

± 0.030 at 600 °C

Resolution: 0.001 °C (0.001 °F)

Based on a 10kΩ (at 25 °C) thermistor with a beta value of 4000 Ω.

Table 15 Fast Scan Mode Specifications

Probe Type Times Normal specification

PRTs 0Ω to 400Ω 2

Thermocouples 2

Thermistors to 100K 5

Thermistors 100K to 500K 10

Table 16 Sample Interval per Channel in Seconds

Probe Type

Normal Mode (sample rate set 1 second)

Fast Scan Mode (sample rate set to Auto)

Probe combination for two channelChannel 1

Channels 1 and 2 Channel 1

Channels 1 and 2

PRT 1s 1.3s 0.45s 0.9s PRT and PRT

Thermistor 1s 1s 0.3s 0.6s Thermistor and Thermistor

Thermocouple 1s 1s 0.3s 0.6s Thermocouple and Thermistor


22

Channel to Channel Differential Specifications Table 17

Probe Type Times Normal specification

T1 – T2 1

T1 – T2 Fast Scan Mode See Table “Fast Scan Mode Specifications”

NOTE: Specification is for T1 – T2 < +/- 10 °C. For Like Probes only. Accuracies do not include probe accuracies.

23

General Operation DC Power Source

General Operation 3 This section explains the details of the operation of the 1523/24 reference thermometer with its components and accessories.

3.1 BatteryThe 1523/24 uses three (3) “AA” alkaline batteries that can power the instrument for 20 hours without replacement. The batteries will discharge more quickly if the backlight is used often. The battery icon will blink as the batteries approach depletion. When the battery icon is blinking, the user should replace batteries immediately to avoid affecting the accuracy of the instrument.

The batteries can be easily removed and replaced in the field by following this procedure:

Power the 1523/24 off and unplug the AC adapter from the unit.1.

Remove the yellow boot.2.

With the 1523/24 facing down, remove the screw and battery cover.3.

Remove the batteries.4.

Place new batteries into the unit.5.

Close the battery cover and replace the screw.6.

Replace the yellow boot.7.

Warning: Used batteries must be disposed of properly. Check your local regulations for additional information. You may return used batteries to the manufacturer. Never dispose of batteries in fire as this may result in explosion with the possibility of personal injury or property damage.

DC Power Source3.2 The DC power source provides power to the 1523/24 reference thermometer. The AC adapter provided with the 1523/24 is intended to be used for this purpose. Use only the AC adapter supplied with the instrument. The DC power source plugs into the DC power input on the right side of the 1523/24.

1523, 1524 Reference ThermometerProbe

24

+

Figure 14 12V DC Power source Polarity

Warning: The AC adapter has circuits with high voltages inside that could present danger of electric shock or fire if exposed. If the AC adapter is damaged in any way or becomes hot, discontinue its use immediately, disconnect it from any AC supply, and have it replaced. Do not attempt to open, repair, or continue using a damaged or defective AC adapter

3.3 ProbeThe probe is used to sense temperature. The 1523 is a single channel instrument and can measure using one probe. The 1524 is a dual channel instrument and can measure using two probes simultaneously. The probes attach to the 1523/24 using a Hart INFO-CON probe connector that plugs into the top of the instrument. The probe connector must be properly programmed with the correct characteristics of the probe for mea-surements to be accurate.

The 1523/24 can be used with various types of PRTs, Thermistors and Thermocouple probes:

ITS-90 calibrated 25 Ω or 100 Ω PRT

Callender-Van Dusen calibrated 100 Ω PRT,

Steinhart-Hart thermistor R(T) polynomial; nominal R (25°C) 2KΩ to 100KΩ.

Types B, C, E, J, K, L, M, N, R, S, T, U Thermocouples

The 1523 can measure PRT probes having 4 wires, thermistors, or thermocouples. The 1524 can measure PRT probes having 4 wires, and thermistors on either channel 1 or channel 2, and can measure thermocouples on channel 1 (only). Channel 2 on the 1524 cannot be used with thermocouples.

25

General Operation Probe Lock Function

Internal or External reference junction compensation may be used with 3.3.1 this instrument.

TC Internal Reference Junction3.3.2 With internal reference junction compensation, the temperature of the Thermocouple connection is measured automatically and used to calculate the absolute temperature of the thermocouple. The infocon reference junction parameter must be programmed to Internal, and the external temperature parameter in the infocon will be ignored.

TC External Reference Junction3.3.3 With External Reference junction compensation, the reference junction is held at a known fixed temperature. The value of the fixed temperature reference is used to calculate the absolute temperature of the thermocouple.

In this method, the reference junction is created externally and copper wires connect the reference junction to the 1523/24. The reference junction is placed in an ice bath or other temperature source that has a precisely known and stable temperature. This technique offers improved accuracy but is less convenient because of the more compli-cated connection scheme and the requirement of a precision temperature source.

The external reference temperature parameter and the external reference junction parameter must be set in the infocon connector prior to using this method.

Temperature is generally sensed at the tip of the probe. To get an accurate temperature measurement the probe sheath should be well immersed, with adequate depth and fit into the medium to be measured.

Caution: Probes are fragile devices that can be easily damaged by mechanical shock, overheating, and absorption of moisture or fluids in the wires or hub. Damage may not be visibly apparent but nevertheless can cause drift, instability, and loss of accuracy. Observe the following precautions:

Do not allow probes to be dropped, struck, bent or stressed.

Do not overheat probes beyond their recommended temperature range.

Do not allow any part of the probe other than the sheath to be immersed in fluid.

Do not allow the probe hub or wires to be exposed to excessive temperatures.

Keep the probe wires clean and away from fluids.

3.4 Probe Lock FunctionThe 1523 may be locked for exclusive operation with a specific probe, for quality con-trol purposes, and each channel of the 1524 may be locked with its own unique probe. Locking the probe also prevents use with other readouts, until the probe is unlocked.

To set the probe lock, plug in the probe to the channel that you want to lock it to. First send the unit password enable command, SYST:PASS:CEN XXXX (where xxxx is the unit password) through the serial port using the 9940 software or a terminal program.

1523, 1524 Reference ThermometerINFO-CON Connector

26

Then send the serial command CALx:DEV:LOCK 1 to the unit, where x is the channel that the probe is connected to.

To unlock a probe send the SYST:PASS:CEN XXXX (where xxxx is the unit pass-word). Then send the command, CALx:DEV:LOCK 0

Any unit can unlock a locked probe. The 9940 software can read in a locked probe's data.

If the probe lock is on and a different probe is attached to the unit or channel the dis-play will show “LOCKED”. Measuring is disabled.

If probe lock is off, the instrument can be used with any probe. Refer to the Digital Communication Interface section of this manual

3.5 INFO-CON ConnectorThe probe(s) connects to the top of the 1523/24 reference thermometer using a Hart INFO-CON connector. The probe connector will fit snugly and lock into place when it is fully inserted. The connector includes a memory device that stores the unique char-acteristics of the probe, allowing the instrument to measure temperature accurately. Generally the probe will be purchased with the connector attached and programmed by the factory. Connectors can be purchased separately and installed on probes by the user. The INFO-CON can be programmed directly from the 1523/24 by authorized personnel using the serial port commands or the 9940 software (see Section 6, Digital Communication Interface on page 43).

If it is necessary to connect an INFO-CON connector to a probe in the field, follow the diagram below for connecting the wires of the probe to the connector terminals. Be-fore opening the INFO-CON case, be sure to be grounded with an ESD strap to avoid damaging the memory chip. If a shield wire is present it should not be connected.

27

General Operation INFO-CON Connector

Figure 15 Probe wiring diagrams

29

Display Functions and User InterfaceHOLD

4 Display Functions and User InterfaceThis chapter discusses in detail how to operate the Reference Thermometer us-ing the front panel keys and liquid crystal display (LCD). This includes reading temperature(s) in °C or °F, viewing statistics, using the auxiliary display for differen-tial temperature (T1-T2) or electrical readings (Ω, mV), capturing up to 25 discrete data readings with statistics, logging up to 15,000 readings at selected time intervals, and configuring the communication interface. Refer to the full menu structure diagram in the previous section.

Main Screen4.1 The LCD on the front panel allows direct viewing of the temperature readings, auxilia-ry reading, statistics (MIN, MAX, AVE, and STDDEV), or a graphical representation of the temperature reading over time with the temperature or stats for the temperature above the graph. The temperature displayed is either in °C or °F, and is easily changed by pressing the °C °F key on the front keypad. The main displayed value is the tem-perature reading from the probe. The auxiliary reading is the value displayed based on the user options from the SETUP menu and includes the reading in ohms, mV, Delta X, T1 – T2, or T2 – T1, or the reference junction temperature if a thermocouple is used. The main screen will also show the menu items and selections when a menu related key is pressed. The following sections describe the keys and menu functions.

4.2 STATSThe STATS key allows the user to view the minimum, maximum, average, and the standard deviation of the readings on each channel. When using this feature, press the STATS key to enter this mode. Press the STATS key again to toggle through the statis-tics options, MAX, MIN, AVE, and STDDEV. The results of the selection are shown in the main numeric display. If the user enters into the graphing mode, the results of the selection will be displayed across the top of the graph in the smaller characters. When using this feature on the 1524 dual channel instrument, both of the channels will display the same selection, MIN, MAX, AVE, or STDDEV. The user is unable to select different statistics options for each channel. Press the RESET or HOME keys to exit the STATS mode.

4.3 °C °FThe °C °F key allows the user to quickly change between units. In the main numeric screen, this key will toggle the units in both the main and auxiliary display values. In graphing mode, the unit change will cause the graph to refresh. Select units prior to starting a graphing session. Units are displayed and recorded with temperature read-ings, auxiliary readings, and logged data.

4.4 HOLDThis mode is identified by “HOLD” which appears on the bottom center of the display.

1523, 1524 Reference ThermometerSETUP

30

In this mode the data stored and displayed last remains on screen, this includes statis-tics information. Press the HOLD or HOME keys to exit the hold mode.

4.5 SETUPThe SETUP key accesses the SETUP Menu and allows access to Channel T1 Setup submenus, Channel T2 Setup submenus (1524 only), Instrument setup, and the Date/Time (1524 only) submenus. The submenus allow the user to configure the instrument and its system parameters.

Channel T14.5.1 Select the Channel T1 submenu by pressing the ENTER key. This menu allows the user access to view the probe data from the INFO-CON connector and to setup the auxiliary display for channel T1.

Probe4.5.1.1

This is a read only field; it tells the user the probe and/or the conversion type used with the related probe.

Config4.5.1.2

This is a read only screen, when accessed by pressing the ENTER key, the user can view all of the setup information retained in the INFO-CON connector. This informa-tion tells the user the conversion type, serial number, calibration date, all of the coef-ficients used for this probe, reference junction type (internal or external) if the probe is a thermocouple, and the Min and Max temperatures allowed for the probe.

Base X4.5.1.3

This is the reference value used by the DeltaX function in the auxiliary display. Del-taX calculates the difference between the current reading and Base X.

Aux Displ4.5.1.4

This is the Auxiliary display selection. In addition to temperature on the main numeric output, the user may choose to display an auxiliary measurement for channel T1. For a resistance thermometer, the user may select to display Ohms, DeltaX, (T1-T2), or None.

If this display feature is for a thermocouple, the user may choose to display RJ Tem-perature, mV, (T1-T2), DeltaX or None.

Ohms4.5.1.4.1

This mode is identified by “W” along the top of the screen. In this mode, the resistance in Ohms for the temperature measurement appears on the top of the display. This op-tion is available when the selected channel is reading PRTs or thermistors.

31

Display Functions and User InterfaceSETUP

mV4.5.1.4.2

This mode is identified by “mV” along the top of the screen. In this mode, the voltage reading in mVs for the temperature measurement appears on the top of the display. This option is available when the selected channel is reading thermocouples.

RJ Temp4.5.1.4.3

This mode is identified by “RJ” along the top of the screen. In this mode, the reference junction temperature reading appears on the top of the display. This option is available when the selected channel is reading thermocouples and the reference junction is set to Internal.

DeltaX4.5.1.4.4

This mode is identified by “DX” along the top of the screen. In this mode, the differ-ence (delta) between the measurement and a previously stored reference value (Base X) appears on the top of the display.

T1-T24.5.1.4.5

This mode is identified by “DT” along the top of the screen in the T1 row. In this mode, the difference between the channel T1 reading and the channel T2 reading is shown on the top of the display in the first row. This mode is only available in model 1524.

None4.5.1.4.6

In this mode, nothing is displayed in the auxiliary display area.

Temp Res4.5.1.5

The Temperature Resolution may be changed from 0 to 3 decimal places when using a resistance thermometer. A maximum of two decimal places is allowed if using a thermocouple probe.

RJ4.5.1.6

Thermocouple reference junction compensation may be either internal or external, depending whether the thermocouple has an external reference junction or not. Refer-ence junction temperatures for the external type may be entered through the display. Reference junction temperatures for internally compensated thermocouples can be shown on the auxiliary display. The reference junction type will be identified in the INFO-CON connector for the specific thermocouple and can only be edited through the serial port.

Channel T2 (1524 Only)4.5.2 Select the Channel T2 submenu by pressing the ENTER key. This menu allows the user access to view the probe data from the INFO-CON connector and to setup the

1523, 1524 Reference ThermometerSETUP

32

auxiliary display for Channel T2. Channel T2 is only used for PRTs and thermistors. This channel can not be used for thermocouples. This Submenu is available in model 1524 only.

Probe4.5.2.1

This is a read only field; it tells the user the probe and/or the conversion type used with the related probe.

Config4.5.2.2

This is a read only screen, when accessed by pressing the ENTER key, the user can view all of the setup information retained in the INFO-CON connector. This informa-tion tells the user the conversion type, serial number, calibration date, all of the coef-ficients used for this probe, and the Min and Max temperatures allowed for the probe.

Base X4.5.2.3

This is a reference value that may be stored in the unit for use as a comparison or dif-ference value from the current reading when using the DeltaX auxiliary display.

Aux Displ4.5.2.4

This is the Auxiliary display selection. In addition to temperature on the main numeric output, the user may choose to display an auxiliary measurement for channel T2. For a resistance thermometer, the user may choose to display Ohms, DeltaX, (T2-T1), or None.

Ohms4.5.2.4.1

This mode is identified by “W” along the top of the screen. In this mode, the resistance in Ohms for the temperature measurement appears on the top of the display. This op-tion is available when the selected channel is reading PRTs or thermistors.

T2-T14.5.2.4.2

This mode is identified by “DT” along the top of the screen in the T2 row. In this mode, the difference between the Channel T2 reading and the Channel T1 reading is shown on the top of the display. This mode is only available in Channel T2 on model 1524.

DeltaX4.5.2.4.3

This mode is identified by “DX” along the top of the screen. In this mode, the dif-ference (or delta) between the measurement and a previously stored reference value (Base X) appears on the top of the display.

33

Display Functions and User InterfaceSETUP

None4.5.2.4.4

In this mode, nothing is displayed in the auxiliary display area.

Temp Res4.5.2.5

The Temperature Resolution may be changed from 0 to 3 decimal places if using a resistance thermometer, or a maximum of two decimal places if using a thermocouple probe.

Instrument4.5.3 The instrument menu allows the user access to the serial port setup, unit Auto-Off timer, backlight timer, contrast and the fast scan rate mode. The Auto-Off timer and backlight timer are power saving settings for use when operating on battery power.

4.5.3.1 Fast Scan Mode

This mode allows the user to increase the sample rate in the instrument. When this mode is used, the sample rate is increased at the expense of the accuracy. The instru-ment specifications are only guaranteed when the Fast Scan Mode is turned off. Refer to alternate specifications for operating in Fast Scan mode. This setting is not stored in the memory and is reset to off at power up.

4.5.3.2 Contrast

This is an incremental setting selection that enables the user to change the screen contrast. An increase in value results in a darker contrast. A decrease in value results in a lighter contrast.

4.5.3.3 Auto-Off

This timer setting tells the unit how long to stay on before shutting down. Allowable settings Range from 1 to 30 minutes or the user may turn this feature Off. If the unit turns off, this feature will terminate the graphing mode and auto logging mode when shutting down. The user will need to press the POWER key in order to restart the unit.

Backlight Time4.5.3.4

This timer setting tells the unit how long to keep the back light illuminated before shutting down. Allowable settings range from 1 to 30 minutes or the user may turn this feature Off.

Serial Port4.5.3.5

This feature allows the user to turn the serial port On or Off. This is a battery saving feature and is recommended when operating on battery power and when direct upload-ing to a PC is not required. Data may be gathered in the Demand Log or Auto-Log modes prior to turning on the serial port and uploading the information.

1523, 1524 Reference ThermometerSAVE

34

4.5.3.6 Baud Rate

This feature allows the user to change the baud rate from 9600 (default) or 2400 baud.

4.5.3.7 Date/Time

This feature allows the user to change or adjust the Time and Date. The time and date is recorded on all Log files saved. This feature is only available on model 1524.

Date4.5.3.7.1

The date feature allows the user to adjust the month, day and year in an YYYY/MM/DD format. The date can be adjusted by using the up and down arrow keys while in the date field, and pressing the ENTER key to save the change. The curser will highlight the year <YYYY> field when entering into this screen. Use the up and down arrow keys to adjust the year. Press the ENTER key to save the change and advance to the month <MM> field. Adjust the months in the same manner and press the ENTER key when complete. This will advance the curser to the next field, days <DD>. Change the days field to the correct day in the same manner and press the ENTER key when complete. This feature is only available on model 1524.

Time4.5.3.7.2

The time feature allows the user to adjust the HH/MM/SS in 24 hour format. The time can be adjusted by using the up and down arrow keys while in the time field, and then pressing the ENTER key to save the change. The curser will highlight the hour <HH> field when entering into the time fields from the date fields. Use the up and down ar-row keys to adjust the hour. Press the ENTER key to save the change and advance to the min <MM> field. Adjust the minutes in the same manner and press the ENTER key when complete. This will advance the curser to the next field, seconds<SS>. Change the seconds field to the correct second in the same manner and press the EN-TER key when complete. This feature is only available on model 1524.

4.6 SAVEA point is saved into the demand log when the SAVE key is pressed while in the nu-meric or graphic display mode. Up to 25 points may be stored using the demand log.

When the SAVE key is pressed, the bottom row of the display will indicate that a save has occurred with a tag ID “SAV01” (followed by a date and time if model 1524). If there are 25 points already stored, SAV FULL (save full) will be displayed for 3 sec-onds and no new data will be recorded.

4.7 ARROWS, UP, DOWNThe up and down arrow keys allow the user to select options within a field indicated by an up and down arrow indicator to the right or left of the field.

35

Display Functions and User InterfaceRECALL

4.8 ENTERThe ENTER key is used to select a menu option, accept a setting change, configura-tion change, or enable a logging session.

4.9 RECALLThe 1523/24 has a Demand Log that stores up to 25 readings that may be displayed on screen or sent out the serial port to a computer. The RECALL menu allows the user to review, delete, or send demand log data out the serial port.

The 1524 has an Auto-Log with the added capability of storing up to 15,000 readings with a time and date stamp on each reading. The readings can be sent to a computer or deleted using this menu.

Review Saved4.9.1 This menu displays one of up to 25 saved readings on main screen for review. The display shows channel, auxiliary display value, main display value, tag id and time stamp if model 1524. The user can scroll through each log by pressing the up and down arrow keys. The user can exit this review mode by pressing the RECALL or the HOME (SHIFT + ENTER) keys.

Send Saved4.9.2 This feature sends the entire demand log out the serial port to a computer. When all of the data is sent, the display will show “100%” to the right of the Send Saved command selection to indicate that the send function is complete. This does not affect the stored data. Refer to the Demand Log, and Digital Communications Interface section of this manual for more information.

Delete Saved4.9.3 This feature allows the user to delete data files saved in the Demand Log. The user may delete a specified file or all files. Use the Up and Down arrow keys to select the file to delete. The instrument default is used to delete all files. The user can exit this menu and return to the main display by pressing the RECALL or HOME (SHIFT + ENTER) key(s).

Send Logs4.9.4 This feature allows the user to send logged data files out the serial port to a computer. In order to use this feature the user must turn the serial port on, and set the baud rate to the appropriate setting. Refer to Section 5.2, AUTO-LOG on page 39, and Section 6, Digital Communication Interface on page 43for more information. This feature is available on model 1524 only.

1523, 1524 Reference ThermometerNEXT

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Delete Logs4.9.5 This feature allows the user to delete logged data files. The user may delete a specified file identified by the Tag ID, or all files. Use the up and down arrow keys to select the file to delete. The instrument default is to delete all files. The user can exit this menu and return to the main display by pressing the RECALL or HOME (SHIFT + ENTER) key(s). This feature is available on model 1524 only.

4.10 NEXTThe NEXT key is used to move from field to field in the menu.

4.11 SHIFTThis feature allows the user to use second function keys (identified in yellow) on the keypad. Following a press of the shift key, “SHIFT” will be displayed on the lower right side of the display. When in the “TREND” mode with a graph displayed, the “SHIFT” will be displayed on the upper left area of the display. Pressing the “SHIFT” key a second time eliminates the second function request.

4.12 RESETThe RESET key (SHIFT + STATS) is used to exit the STATS mode. Upon exiting the STATS mode the minimum, maximum, average and standard deviation values are reset.

4.13 Ω mVThe Ω mV key (SHIFT + °C °F) switches the main numeric display from degrees to ohms/mV or ohms/mV to degrees. This feature allows the user to select between the reading in base units (ohms or millivolts) and the reading converted to temperature.

4.14 TRENDThe TREND key (SHIFT + HOLD) switches from numeric to graphic mode, or from graphic to numeric mode. This feature provides the user with a convenient visual dis-play of temperature over time by graphing the data in a temperature vs. time plot. This may be used to assess settling time, stability, disturbances, or oscillations. This feature is affected by the Auto-Off function. If the Auto-Off function is used and the unit turns off during graphing, the graph will be terminated and the unit will restart in numeric mode. It is recommended that the Auto-Off function be turned off before starting a graphing session.

The time scale is displayed on the horizontal axis and is not adjustable. The time scale is fixed at 6 seconds per reading, allowing up to 10 minutes of data to be shown on the graph. When the graph extends to the far right of the screen, the graph will scroll to the left about 25% of the screen and continue plotting.

The temperature scale is displayed on the vertical axis and is adjustable up to 4 orders of magnitude. The display range is shown on the left side of the vertical axis and is ad-

37

Display Functions and User InterfaceLOG

justed using the UP and DOWN ARROW keys to increase or decrease the scale range. The available range selections are +/- 0.01, +/-0.1, +/-1.0, +/- 10.0 °C. The vertical scale center is calculated automatically and displayed.

The graphing function may be used on models 1523 and 1524. The 1523 will al-ways display Channel T1. When using the 1524 instrument, Channel T1 is selected by default, the user may select between Channel T1 and Channel T2 by pressing the “NEXT” key. In this mode, data for both Channel T1 and Channel T2 graphs are main-tained simultaneously. Only one channel may be displayed at a time while the other channel is held in memory. When a channel is switched, the graph is replaced with data from the new channel.

While in the graphing mode, the channel being displayed is shown on the top left area of the display, ‘T1” or “T2”. The top right area of the display shows the statistical option, followed by the statistical value for the displayed channel in numeric format. The most recent temperature measurement is displayed in numeric format above the graph and just below the stats value. The statistical option selection may be changed by pressing the “STATS” key until the desired option (MIN, MAX, AVE, or STD) appears on the display. Note: Standard deviation will be shown on the screen in this mode as STD rather than the usual STD DEV.

The graph is cleared when the display mode is changed to or from a numeric format, or if the temperature units are changed. In addition, entering in the SETUP Menu will cause the graph to refresh.

4.15 LOGThe Auto-Log feature allows the user to setup data collection and storage on both channels. This menu selection allows the user to setup the interval of the logged data, a tag or identification label, see the available memory for storage, and session start & stop. This Auto-Log feature is only available in model 1524.

The Auto-Log feature is affected by the Auto-Off function. If the Auto-Off function is used and the unit turns off during a logging session, the logging session will be termi-nated and the unit will restart with the Auto-Log turned off. It is recommended that the Auto-Off function be turned Off before starting a logging session.

Free4.15.1 This feature indicates the amount of memory available for storage, in terms of % memory unused. It also indicates how many bytes of memory are available for use.

4.15.2 IntervalThis feature allows the user to select the interval used by the processor to take new data. The available selections are Auto, 1, 2, 5, 10, 30 and 60 seconds If logging with a model 1524 using two active probes and a 1 second interval, a second of data will be skipped approximately every three seconds in order to have unique values in every set of stored data. When the unit is in Auto interval sampling, the Fast Scan Mode Speci-fications apply. Refer to Table XXX, Fast Scan Mode Specifications and Table XXX, Sample Interval per Channel in Seconds

1523, 1524 Reference ThermometerHOME

38

4.15.3 TagThis is a label attached to the stored data set. The tag name may be changed by the user using the serial interface port. This name can be 8 alpha numeric characters long.

Session4.15.4 This feature is used to start or stop logging sessions. Only the available condition (START or STOP) can be selected.

4.16 HOMEThe HOME key (SHIFT + ENTER) allows the user to return to the main screen from anywhere in the menu.

39

LOGSAUTO-LOG

5 LOGSThere are two log features associated with models 1523/1524, the Demand Log and the Auto-Log. Both the 1523 and 1524 have a demand log that stores up to 25 read-ings. The 1524 has an Auto-Log that can store up to 15,000 readings at specified inter-vals. The Auto-Log feature is affected by the Auto-Off function. If the Auto-Off func-tion is used and the unit turns off during a logging session, the logging session will be terminated and the unit will restart with the Auto-Log turned off. It is recommended that the Auto-Off function be turned off before starting an Auto logging session.

5.1 DEMAND LOGThis feature is used to log and recall up to 25 points. A point is logged using the SAVE key. Logged data is saved in memory and is retained after the unit is turned off. The data can be uploaded to a computer using the Send Saved command in the RECALL Menu, or by remote commands issued through the serial port. Refer to the Digital Communications Interface section of this manual for more information on the serial commands.

Each logged data point contains the following data:

Current reading with units of measureCurrent statistics, including maximum, minimum, average, and standard deviation.User selected secondary readings, including units.Time stamp including year, month, day, hour, minute and second (model 1524 only).

5.2 AUTO-LOGThis feature is used to log and store up to 15,000 points. A point is logged on a prede-termined frequency based on the LOG Menu settings. Logged data is saved in memory and is retained after the unit is turned off. The data can be uploaded to a computer using the Send Logs command in the RECALL Menu, or by remote commands issued through the serial port. Refer to the Digital Communications Interface section for more information on the serial commands.

The LOG key allows the user to access the LOG setup menu. The Log menu allows the user to setup the data collection interval, start a log with a specified Tag ID, see the available memory, and START or STOP a logging session. The RECALL menu allows the user to delete, or send log data out the serial port.

Refer to the Digital Communications Interface section for information on changing Tag IDs or using the computer interface.

Auto-Log Operation5.2.1 A log session is configured and started or stopped by pressing the LOG key (SHIFT + SAVE). The following screen is displayed:

Free: nn% rrrrrInterval: tt sec. (or Auto)

1523, 1524 Reference ThermometerAUTO-LOG

40

Tag: vv, xxxxxxxx *“yy/mm/dd hh:mm:ss” or “No Data”Session: START (or STOP)

Where:

Free: indicates the percentage of unused memory (nn), and the total number of records that can be stored before it becomes full (rrrrr), and automatically stops.

Interval: is the logging interval (tt) expressed in seconds. The choices are Auto, 1, 2, 5, 10, 30, and 60. 10 seconds is the default for a new log. Note: When the unit is Auto interval sampling, the Fast Scan Mode Specifications apply. Refer to Table 15 on page 21, Fast Scan Mode Specifications and Table 16 on page 21, Sample Interval per Channel in Seconds

Tag: is an alpha-numeric identifier (vv) from 1 to 25, followed by a Tag ID (xxxxxxx). The default Tag ID names are DATA_01 to DATA_25 or the user specified eight character tag name. If the tag has stored data, an asterisk (*) will follow the tag name and the following line will contain the time stamp (Date followed by Time). If the tag contains no data, “No Data” will be shown on the line following the Tag name.

Note: the user specified Tag can only be updated through serial communications through the serial port. Refer to Section 6, Digital Communication Interface on page 43.

Session: START will be displayed when logging is not in use, STOP will be displayed when logging is in use.

If logging is not in use when Auto-Log is selected, the user may change the interval and Start the logging session. If a logging session is in use, the user may choose to stop the session; no other actions may be performed by the user in this menu window.

The user may exit this screen without performing an action by pressing the LOG key (SHIFT + SAVE) or the HOME key (SHIFT + ENTER).

Once an Auto-Log is started, the present primary value and the units for each channel in use are stored at the selected interval. The lower line on the main screen shows the log status as follows:

LOG n hh:mm:ss

Where n is the number or data points currently logged into the selected Tag ID, and hh:mm:ss is the elapsed time since the log session started.

The update is in the selected interval of the logging session. For example, if the ses-sion has a 10 second log interval, the update on the main screen will also be in 10 second intervals.

When the log storage is full, the lower line on the main screen will change to “LOG Full” and will remain until the user turns off the logging session by pressing the LOG key (SHIFT + SAVE) and pressing ENTER to stop the session.

41

LOGSAUTO-LOG

Note: If logging with a model 1524 using two active probes and a 1 second interval, a second of data will be skipped approximately every three seconds in order to have unique values in every set of stored data. When the unit is in Auto interval sampling, the Fast Scan Mode Specifications apply. Refer to Table XXX, Fast Scan Mode Specifications and Table XXX, Sample Interval per Channel in Seconds

Sending 5.2.2 Auto Log Data to a ComputerThe data from one or all tags can be sent out the serial port to a computer. In order to send data out the serial port, the instrument must be in the main numeric screen, and the logging session must be turned off (no logging or graphing).The user may then press the RECALL key and press the NEXT key to highlight the Send Logs selection, then press ENTER.

The next menu screen will allow the user to select a specific Tag ID to download or choose to down load All tags. Use the up and down arrow keys to make selection.

5.2.3 Data Upload FormatEach data line includes the default or the user defined Tag ID, the channel number, the primary value with units, and time and date. Note: The time stamp is available on model 1524 only. If only one channel is active during the logging session, only the data for the active channel will be will be sent through the serial port. If both channels are active, the records for each channel will alternate on the output. The output format is shown in the following example for a two channel output:

DATA_25,1, 22.676, C, 15:19:42,2008-05-24DATA_25,2, 23.245, C, 15:19:44,2008-05-24DATA_25,1, 23.220, C, 15:19:46,2008-05-24DATA_25,2, 23.260, C, 15:19:48,2008-05-24DATA_25,1, 22.765, C, 15:19:50,2008-05-24DATA_25,2, 23.263, C, 15:19:52,2008-05-24

Each data field is comma delimited, and each record is terminated with a carriage re-turn (CR) and a new line (LF) command. For more information on the serial interface protocols, see the Digital Communications Interface section.

Deleting 5.2.4 Auto Log DataThis feature allows the user to delete logged data files by selecting Delete Logs in the RECALL menu. The user may delete a specified file, identified by the Tag ID, or select All files. Use the Up and Down arrow keys to select the file to delete. The instrument default is to delete All files. Once the user has selected the data files to delete, press ENTER to delete the file. The instrument will request the user to confirm deletion and the user must press ENTER again to delete, or press NEXT to cancel the request. The user can exit this menu and return to the main display by pressing the RECALL or HOME (SHIFT + ENTER) key(s) at any time. This feature is available in model 1524 only.

43

Digital Communication InterfaceWiring

6 Digital Communication InterfaceThe 1523/24 handheld readout is capable of communicating with and being controlled by an external device through the RS-232 digital interface.

With a digital interface, the instrument may be connected to a computer. This allows the user to obtain measurement data and control operating conditions. The RS-232 se-rial interface allows serial digital communications over fairly long distances. With the serial interface, the user may access any of the functions, parameters and settings dis-cussed in this section. The 9940 software that came with the unit is available to assist in the communications interface. Refer to the documentation included on the software CD for additional information.

Wiring6.1 The serial communications cable attaches to the instrument through the 1/8” mini-jack connector at the top of the instrument. To reduce the possibility of electrical interface, the serial cable should be shielded with low resistance between the connector and the shield. It should not be much longer than is necessary. Data Upload Format

Each data field is comma delimited, and each record is terminated with a carriage return (CR) and a new line (LF) command.

1

2

3

4

5

6

7

8

9

RxD

TxD

GND

RxD

TxD

GND

Figure 16 RS-232 wiring

1523, 1524 Reference ThermometerCommand Syntax

44

Setup6.1.1 Before operation, the serial interface must first be set up by turning on the serial port and programming the BAUD rate. This can be accessed from the main menu by select-ing SETUP Instrument.

6.1.2 Serial OperationThe serial communications uses 8 data bits, one stop bit, and no parity. The baud rate is set to 9600 as the default. The user can also select 2400 baud.

Data Upload Format 6.1.3 Each data field is comma delimited, and each record is terminated with a carriage return (CR) and a new line (LF) command.

6.2 Command SyntaxThe instrument accepts commands for setting parameters, executing functions or responding with requested data. These commands are in the form of strings of ASCII-encoded characters. As far as possible, the 1523/24 command syntax conforms to IEEE-488.2 1992, SCPI 1999, with the following exceptions:

Compound commands, separated by semicolons, are not allowed.

Overlapped commands are not supported.

Processing of commands is sequential, and each command is completed before con-tinuing to the next command.

Probe parameters may only be queried and set on one per command basis. There is insufficient memory available to accommodate the potentially long command strings possible with multiple parameters per command.

The MIN, MAX, DEF, and ALL data entry options are not generally allowed.

Parsing is based only on the first 3 or 4 significant letters of a keyword, all subsequent letters up to the next colon, space, or suffix number are ignored. The significant letters are shown in upper case.

All commands and parameters are case insensitive. Lower case letters are changed to upper case before processing.

Null commands (terminator only received) are ignored.

The receive buffer capacity is 96 characters after which an over run error is queued and the buffer contents are ignored. Short form command mnemonics are shown in upper case letters, with the additional letters required for the long form appended in lower case. Either form is permitted.

Many commands have a mnemonic suffix, or parameter value, of 1 or 2 to specify the probe number addressed by the command. If a command with a value of 2 is used on a 1523, which has only one probe, a command error occurs and the command is ignored.

45

Digital Communication InterfaceSerial Commands by Function or Group

Serial Commands by Function or Group6.3 In this section, the commands are arranged into the following groups:

Data Logging Commands – commands to report and setup the logging data.

Calibration and Setup Commands – commands to setup the calibration of the instrument

Measurement Commands – commands to report and setup the measure parameters of the instrument.

Probe Setup Commands – commands to report and setup probe information.

Status and Event Commands – commands to report and setup the status of the instrument.

System Commands – commands to report and change the system information, com-munication, and password of the instrument.

Commands by Function or GroupTable 18

Functions or Groups

SCREEN PARAMETER Command

Password Protection

Group Read/Write

Data Logging - Automatic

Tag LOG:AUT:DEL <num> N/A W

(none) LOG:AUT:FREE? N/A R

(none) LOG:AUT:LAB? N/A R

(none) LOG:AUT:LAB <num> N/A W

(none) LOG:AUT:POIN? N/A R

(none) LOG:AUT:PRIN <num> N/A R

SESSION LOG:AUT:STAT? N/A R

SESSION LOG:AUT:STAT <bool> N/A W

INTERVAL LOG:AUT:TIM? N/A R

INTERVAL LOG:AUT:TIM <rate> N/A W

TAG LOG:AUT:VAL? <num> N/A R

Data Logging - Common

TAG LOG:LAB<n>:NAME? N/A R

TAG LOG:LAB<n>:NAME <label> N/A W

Data Logging - Demand

(none) LOG:DEM:DEL N/A W

(none) LOG:DEM:FREE? N/A R

(none) LOG:DEM:POIN? N/A R

(none) LOG:DEM:PRIN N/A R

(none) LOG:DEM:VAL? <num> N/A R

(none) LOG:DEM:STAT<n>? <num> N/A R

Display TEMP:RES DISP<chn>:RES? N/A R

TEMP:RES DISP<chn>:RES <num> N/A W

UNITS UNIT:TEMP? N/A R

UNITS UNIT:TEMP <unit> N/A W

1523, 1524 Reference ThermometerSerial Commands by Function or Group

46

Functions or Groups


Password Protection

Group Read/Write

Calibration & Setup (none) CAL:DEV:AUTO? N/A R

(none) CAL:DEV:AUTO <val> N/A W

(none) CAL<chn>:DEV:LOCK? N/A R

(none) Cal<chn>:DEV:LOCK <bool> Conditional* W

(none) CAL<chn>:DEV:LOCK:DATA? N/A R

(none) CAL<chn>:DEV:RANG:ADJ<num>? N/A R

(none) CAL<chn>:DEV:RANG:ADJ<num> <val> Conditional* W

(none) CAL<chn>:DEV:RANG:CLEA Conditional* W

(none) CAL<chn>:DEV:RANG:NUM N/A R

(none) CAL<chn>:DEV:RANG:NUM <val> Conditional* W

(none) CAL<chn>:DEV:RANG:REF<num>? N/A R

(none) CAL<chn>:DEV:RANG:REF<num> <val> Conditional* W

(none) CAL<chn>:DEV:RANG:SEL? N/A R

(none) CAL<chn>:DEV:RANG:SEL <val> N/A W

Measurement (none) CALC:AVER:CLE N/A W

(none) CALC<prb>:AVER<n>:DATA? N/A R

(none) CALC:AVER<n>:TYPE? N/A R

(none) FETC? <prb> N/A R

(none) MEAS? <prb> N/A R

(none) READ? <prb> N/A R

(none) SENS:DATA:MV? N/A R

(none) SENS<prb>:DATA:OHMS? N/A R

(none) SENS:DATA:RJ? N/A R

RJ SENS:RJ:STAT? N/A R

(none) SENS:RJ:TEMP? N/A R

(none) SENS:RJ:TEMP <val> N/A W








47

Digital Communication InterfaceSerial Commands by Function or Group

Functions or Groups


Password Protection

Group Read/Write

Probe Setup DATE CALC<prb>:CONV:DATE:CAL? N/A R

DATE CALC<prb>:CONV:DATE:CAL <year>,<month>,<day>

Conditional* W

(none) CALC<prb>:CONV:NAM? N/A R

(none) CALC<prb>:CONV:NAM <conv> Conditional* W

(none) CALC<prb>:CONV:PAR:CAT? N/A R

(none) CALC<prb>:CONV:PAR:VAL? <param> N/A R

(none) CALC<prb>:CONV:PAR:VAL <param>,<num> Conditional* W

(none) CALC<prb>:CONV:SNUM? N/A R

(none) CALC<prb>:CONV:SNUM <seri> Conditional* W

(none) CALC<prb>:CONV:TEST? <res>|<mv>|[,rjt] N/A R

(none) CALC:CONV:UPD N/A W

(none) CALC<prb>:CONV:IDEN? N/A R

(none) CALC<prb>:CONV:IDEN <num> Conditional* W

(none) CALC<prb>:CONV:VERS? N/A R

(none) CALC<prb>:CONV:VERS <num> Conditional* W

Status & Event (none) *RST N/A W

(none) STAT:MEAS:EVEN? N/A R

(none) STAT:MEAS:COND? N/A R

(none) STAT:MEAS:ENAB? N/A R

(none) STAT:MEAS:ENAB <num> N/A W

(none) STAT:QUES:EVEN? N/A R

(none) STAT:QUES:COND? N/A R

(none) STAT:QUES:ENAB? N/A R

(none) STAT:QUES:ENAB <num> N/A W

System - Communication

BAUD RATE SYST:COMM:SER:BAUD? N/A R

BAUD RATE SYST:COMM:SER:BAUD <baud> N/A W

SERIAL PORT SYST:COMM:SER:OFF N/A W

System - Information

(all) *IDN? N/A R

(none) *CLS N/A W

(none) SYST:SNUM? N/A R

(none) SYST:VERS? N/A R

(none) SYST:ERR? N/A R

DATE SYST:DATE? N/A R

DATE SYST:DATE <year>,<month>,<day> N/A W

TIME SYST:TIME? N/A R

TIME SYST:TIME <hour>,<minute>,<second> N/A W

1523, 1524 Reference ThermometerSerial Commands - Alphabetic Listing

48

Functions or Groups


Password Protection

Group Read/Write

System - Password (none) SYST:PASS:CDIS N/A W

PASSWORD SYST:PASS:CEN N/A W

(none) SYST:PASS:CEN:STAT? N/A R

USER PASSWORD SYST:PASS:NEW conditional W

*indicates the command is password controlled. Reference “System - Password” section for password input.

6.4 Serial Commands - Alphabetic ListingEach command description provides the structure (long and short format), a descrip-tion of the command purpose, a command example, an example of what the command returns (as applicable to query commands), and notes specific to the command. The following apply to each group of commands:

Numeric data, specified by the mnemonic, <num>, uses ASCII characters to

represent numbers. Numbers may contain a plus or minus (‘+’ or ‘-’) sign, decimal point (‘.’), and exponent (‘E’ or ‘e’) with its sign. If a fractional component is received when only an integer is required, the number is rounded to the nearest integer without any resulting error message. The mnemonics DEF, MIN, and MAX are often acceptable for the default, minimum, and maximum value respectively. Unit suffixes, such as V or OHM, can be appended to numeric parameters and are accepted without error but ignored.Unrecognized commands or commands with incorrect syntax or invalid

parameters generate error messages in the error queue.Upper case letters designate syntax that is required when issuing the command.

Lower case letters are optional and may be omitted.< > indicates a required parameter.

[ ] indicates optional parameters.

( ) indicates a group of parameters that must be used together.

For query commands, specifying the MIN, MAX, or DEF parameter causes

the instrument to respond with the minimum, maximum, or default setting respectively.For set commands, specifying the MIN, MAX, or DEF parameters causes the

instrument to use the minimum, maximum, or default setting respectively.‘|’ indicates alternate parameter values.

<n> indicates a number is required.

<prb> indicates a probe number (1 or 2) is required.

<num> indicates numeric value is required.

<bool> indicates a Boolean value (0 or 1) is required. The mnemonics OFF and

ON are also accepted for 0 and 1, respectively.<conv> indicates a conversion mnemonic is required.

49

Digital Communication InterfaceSerial Commands - Alphabetic Listing

<param> indicates a parameter name is required.

<seri> indicates a serial number is required.

<unit> indicates a temperature unit is required.

<temp> indicates a temperature °C/F is required.

<pass> indicates a password is required.

<port> indicates a port number is required.

<label> indicates an eight character label is required.

<year> indicates a four digit number is required.

<month> indicates a one or two digit number is required.

<day> indicates a one or two digit number is required.

<hour> indicates a one or two digit number is required.

<minute> indicates a one or two digit number is required.

<second> indicates a one or two digit number is required.

<baud> indicates a valid baud number is required.

*CLSClear the event registers and the error queue.

Example: *CLS

This command has no response.

*IDN?Returns the instrument identification string that indicates the manufacturer, model number, serial number, and firmware version.

Example: *IDN?

Response: FLUKE,1524,23456,1.00

*RSTSet the instrument operating parameters to defined conditions.

Example: *RST


CALCulate:AVERage:CLEarClear the statistical functions for all probes.


50

Example: CALC:AVER:CLE

CALCulate<prb>:AVERage<n>:DATA?Returns the value of a statistical calculation for a given probe. The CALCulate suffix, <prb>, specifies the probe, 1 or 2. Default to 1 if omitted. The AVERage suffix, <n>, specifies the calculation type number as listed in Table 19 on page 72. Defaults to 1 if omitted.

Example: CALC2:AVER1:DATA?

Response: 0.017

CALCulate:AVERage<n>:TYPE?Returns the keyword for the specified field type number. The AVERage suffix, <n>, specifies the calculation type number. Default to 1 if omitted.

Example: CLAC:AVER4:TYPE?

Response: STD

CALCulate<prb>:CONVert:DATE:CALibrate?Returns the last calibration date for the specified probe. The CALCulate suffix, <prb>, specifies the probe, 1 or 2. Defaults to 1 if omitted. The response is returned in the format <year>,<month>,<day>.

Example: CALC1:CONV:DATE:CAL?

Response: 2000,9,22

CALCulate<prb>:CONVert:DATE:CALibrate <year>,<month>,<day>Set the last calibration date for the specified probe.

The CALCulate suffix, <prb>, specifies the probe, 1 or 2. Defaults to 1 if omitted.

The <year> parameter is a four-digit number, 2000 to 2099.

The <month> parameter is a one or two-digit number, 1 to 12.

The <day> parameter is a one or two digit number, 1 to 31.

Example: CALC1:CONV:DATE:CAL 2000,8,29

NOTE: This command is protected, which requires a password to set it.

Error ‘-2003, “Command protected”’ is queued if the password has not been entered with SYST:PASS:CEN

CALCulate<prb>:CONVert:NAMe?Return the keyword of the selected conversion type for the specified probe.


51


Available conversion types are listed in XXX Table3.

Example: CALC1:CONV:NAM?

Response: CVD

CALCulate<prb>:CONVert:NAM <conv>Set the conversion type for the specified probe.


The <conv> parameter is the keyword for the conversion type as listed in Table 20 on page 72.

To activate the new probe conversion type and update the display, the command CALC:CONV:UPD must be sent, the probe must be removed and inserted, or the unit power must be cycled on and off.

Example: CALC2:CONV:NAM CVD



CALCulate<prb>:CONVert:PARameter:CATalog?Return the keywords of the probe characterization parameters associated with the cur-rent conversion type for the specified probe.


Each item in the response list is enclosed in double-quotes and separated from other items by a comma. Each item indicates the keyword of a characterization parameter for the current conversion type. If there are no parameters available for the current conversion type, an empty string is returned.

The list of parameters depends on the selected conversion type as listed in Table 21 on page 73.

Example: CALC2:CONV:PAR:CAT?

Response: “R0”, “A”, “B”, “C”, “MINOP”, “MAXOP”

CALCulate<prb>:CONVert:PARameter:VALue? <param>Return the value of the specified conversion parameter for the specified probe.


The <param> parameter is the keyword of the parameter as listed in XXX Table4.


52

Example: CALC2:CONV:PAR:VAL? RTPW

Response: 100.0145

CALCulate<prb>:CONVert:PARameter:VALue <param>,<num>Set the value of the specified conversion parameter for the specified probe.


The <param> parameter is the keyword of the parameter as listed in Table 21 on page 73.

The <num> parameter is the new value with type and range per the list in Table 21 on page 73.

To activate the new values for the parameters MINOP and MAXOP and update the display, the command CALC:CONV:UPD must be sent, the probe must be removed and inserted, or the unit power must be cycled off and on.

Example: CALC2:CONV:PAR:VAL RTPW,100.0145



CALCulate<prb>:CONVert:SNUMber?Return the probe serial number for the specified probe.


Example: CALC2:CONV:SNUM?

Response: A_336C

CALCulate<prb>:CONVert:SNUMber <seri>Set the probe serial number for the specified probe.


The <seri> parameter consists of up to ten characters, limited to upper case letters, numeric digits, and the underscore ‘_’.

Example: CALC2:CONV:SNUM A-336C



CALCulate<prb>:CONVert:TEST? <res>|<mv>[,rjt]Return the calculated temperature in Celsius for the giving sensor reading.

53



The parameter <res> is the sensor reading in ohms for PRT or thermistor.

The parameter <mv> is the sensor reading in millivolts for thermocouples, with op-tional reference junction temperature <rjt> in Celsius, which defaults to 0 if omitted.

Example: CALC2:CONV:TEST? 100.0

Response: 0.0

CALCulate<prb>:CONVert:UPDateUpdate the display with the latest configuration data from the probe(s).

All probe data is reread and the display(s) are updated accordingly.

Example: CALC2:CONV:UPD

CALCulate<prb>:CONVert:IDENtity?Return the probe data structure identity number for the specified probe.


Example: CALC2:CONV:IDEN?

Response: 23

CALCulate<prb>:CONVert:IDENtity <num>Set the probe data structure identity number for the specified probe.


The <num> parameter is an integer value, 0 to 255.

Example: CALC2:CONV:IDEN 23



CALCulate<prb>:CONVert:VERSion?Return the probe data structure version number for the specified probe.


Example: CALC2:CONV:VERS?

Response: 1

CALCulate<prb>:CONVert:VERSion <num>Set the probe data structure version number for the specified probe.


54


The <num> parameter is an integer value, 0 to 255.

Example: CALC2:CONV:VERS 1



CALibrate:DEVice:AUTO?Return the state of the automatic power off feature.

The response is ON or OFF.

Example: CAL:DEV:AUTO?

Response: ON

CALibrate:DEVice:AUTO <val>Set the state of the automatic power off feature.

The <val> parameter is ON or OFF. When turned on, the timer is set to a default of 30 minutes.

Example: CAL:DEV:AUTO ON

CALibrate<chn>:DEVice:LOCK?Return the lock status of the channel and the inserted probe if any.

The CALibrate suffix, <chn>, specifies the channel, 1 or 2. Defaults to 1 if omitted.

If no probe is inserted, the response is 0 if the channel is not locked, otherwise 1.

If a probe is inserted, the response is 0 if both the channel and the probe are not locked; otherwise 1 if either is locked.

The CALibrate<chn>:DEVice:LOCK:DATA query may be used to obtain details of the channel and probe locks.

Example: CAL2:DEV:LOCK?

Response: 1

CALibrate<chn>:DEVice:LOCK<bool>Exclusively locks the channel to the inserted probe, or unlocks either.


The parameter <bool> is 1 to exclusively lock the channel to the inserted probe. No lock takes place and error ‘-200, “Execution error”’ is queued if no probe is inserted, if the channel is already locked, or if the probe is already locked.

55


The parameter <bool> is 0 to unlock the channel, the inserted probe if any, or both. If no probe is inserted, only the channel is unlocked. If either is already unlocked, no action is taken for the unlocked item and no error is queued.

Example: CAL2:DEV:LOCK 1


Error ‘-203,”Command protected”’ is queued if the password has not been entered with SYST:PASS:CEN.

CALibrate<chn>:DEVice:LOCK:DATA?Returns the lock details of the channel and the inserted probe if any.


The first item returned is the probe serial number to which the channel is exclusively locked. If the channel is not locked, “” is returned.

The second item returned is the unit serial number to which the probe is exclusively locked. If the probe is not locked or no probe is inserted, “” is returned.

The third item returned is the unit channel to which the probe is exclusively locked. If the probe is not locked or no probe is inserted, 0 is returned.

Example: CAL2:DEV:LOCK:DATA?

Response: “ALPHA_5”,”51789”,2

CALibrate:DEVice:RANGe:ADJust<num>?Return the calibration offset from the reference value for a calibration point of the preselected range.

The ADJust suffix, <num>, specifies the calibration point, 1 to the number set with the associated command CAL:DEV:RANG:NUM. If omitted, offset values for all points are returned, separated by commas.

The range must have been preselected with the command CAL<chn>:DEV:RANG:SEL.

The response is expressed in ohms or millivolts depending on the range being calibrated.

Example: CAL:DEV:RANG:ADJ2?

Response: .107

CALibrate:DEVice:RANGe:ADJust<num> <val>Set the calibration offset from the reference value for a calibration point of the prese-lected range.

The ADJust suffix, <num>, specifies the calibration point, 1 to the number set with the associated command CAL:DEV:RANG:NUM. Defaults to 1 if omitted.


56


The parameter <val> is the offset value expressed in ohms or millivolts depending on the range being calibrated.

Example: CAL:DEV:RANG:ADJ2 -.065



CALibrate<chn>:DEVice:RANGe:CLEarReset all calibration points for the preselected range of the specified channel to defaults.



All calibration points are set to a gain of one and an offset of zero.

Example: CAL:DEV:RANG:CLE



CALibrate:DEVice:RANGe:NUMber?Return the number of calibration points for the preselected range.


The response is the number of calibration points in use.

Example: CAL:DEV:RANG:NUM?

Response: 2

CALibrate:DEVice:RANGe:NUMber <val>Set the number of calibration points to use for the preselected range.


The parameter <val> must be 2 to 4.

Example: CAL:DEV:RANG:NUM 2


57



CALibrate:DEVice:RANGe:REFerence<num>?Return the reference value for a calibration point of the preselected range.

The REFerence suffix, <num>, specifies the calibration point, 1 to the number set with the associated command CAL:DEV:RANG:NUM. If omitted, reference values for all points are returned, separated by commas.


The response is expressed in ohms or millivolts depending on the range being calibrated.

Example: CAL:DEV:RANG:REF2?

Response: 10.568

CALibrate:DEVice:RANGe:REFerence<num> <val>Set the reference value for a calibration point of the preselected range.

The REFerence suffix, <num>, specifies the calibration point, 1 to the number set with the associated command CAL:DEV:RANG:NUM. Defaults to 1 if omitted.


The parameter <val> is the reference value expressed in ohms or millivolts depending on the range being calibrated.

The reference points, 1 to the specified number, must be entered in ascending order.

Example: CAL:DEV:RANG:REF2 10.568



CALibrate<chn>:DEVice:RANGe:SELection?Return the range presently being calibrated for the specified channel.


The response is one of the keywords listed in Table 22 on page 74.


58

Example: CAL:DEV:RANG:SEL?

Response: LO_OHMS

CALibrate<chn>:DEVice:RANGe:SELection <val>Set the range presently being calibrated for the specified channel.


The parameter <val> is one of the keywords in Table 22 on page 74. The value NOR-MAL exits calibration mode, reconnects the inserted probe if any, and refreshes the display.

This command sets the range to which all of the following commands apply:

CAL:DEV:RANG:CLEA

CAL:DEV:RANG:NUM

CAL:DEV:RANG:REF

CAL:DEV:RANG:ADJ

Example: CAL:DEV:RANG:SEL LO_OHMS

DISPlay<chn>:RESolution?Return the maximum display resolution setting for the channel.

The DISPlay suffix, <chn>, specifies the channel, 1 or 2. Defaults to 1 if omitted.

Example: DISP1:RES?

Response: 2

DISPlay<chn>:RESolution <num>Set the maximum display resolution for the channel.

The DISPlay suffix, <chn>, specifies the channel, 1 or 2. Defaults to 1 if omitted.

Example: DISP1:RES 3

FETCh? <prb>Return the last measurement for the specified probe, with units according to the UNIT:TEMP setting if it is a temperature.

The <prb> parameter specifies the probe, 1 or 2. Defaults to 1 if omitted.

If there is no valid measurement available, the response is “0.0, OL”.

59


Example: FETC? 1

Response: 105.236

LOGging:AUTomatic:DELete <num>Delete all entries from an auto tag number.

The parameter <num> is the tag number for which all entries are to be deleted, 1 to 25, or 0 to delete all entries for all tags.

Error ‘-221,”Settings conflict”’ is queued if the data logging storage is corrupt, or if the automatic delete or send display is active.

Example: LOG:AUT:DEL 10

LOGging:AUTomatic:FREE?Return the number of Auto-Log entries free, and in use by all tags.

The response consists of the number free entries, followed by the number of used entries, separated by a comma.

Error ‘-221,”Settings conflict”’ is queued if the data logging storage is corrupt.

Example: LOG:AUT:FREE?

Response: 3760,1126

LOGging:AUTomatic:LABel?Return the tag number to which the LOG:AUT:POIN, LOG:AUT:STAT, and LOG:AUT:VAL commands presently apply.

Return a value of 1 to 25, or 0 if not set.


Example: LOG:AUT:LAB?

Response: 15

LOGging:AUTomatic:LABel <num>Set the tag number to which the LOG:AUT:POIN, LOG:AUT:STAT, and LOG:AUT:VAL commands presently apply.

The <num> parameter specifies tag number, 1 to 25.


Example: LOG:AUT:LAB 4

LOGging:AUTomatic:POINt?Return the number of Auto-Log entries already stored for a preselected tag number.


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The tag number addressed must have been previously selected with the LOG:AUT:LAB command.

Error ‘-221,”Settings conflict”’ is queued if the data logging storage is corrupt, or if no tag is selected with LOG:AUT:LAB.

Example: LOG:AUT:POIN?

Response: 28

LOGging:AUTomatic:PRINt <num>Send all Auto-Log entries for a tag number.

The <num> parameter specifies tag number, 1 to 25.

Each data line includes the default or user defined tag name, the channel number, the primary value and units, and the time and date. When both channels are active, records for each channel alternate. When only one channel is active, no records are sent for the inactive channel.


Example: LOG:AUT:PRIN 5

Response:

DATA_25,1,22.676,C,15:19:42.0,2000-05-24

DATA_25,2,9.960,KO,15:19:44.0,2000-05-24

DATA_25,1,23.220,C,15:19:46.0,2000-05-24

DATA_25,2,23.245,C,15:19:48.0,2000-05-24

DATA_25,1,22.765,C,15:19:50.0,2000-05-24

DATA_25,2,9.962,KO,15:19:52.0,2000-05-24

DATA_25,1,23.087,C,15:19:54.0,2000-05-24

DATA_25,2,23.260,C,15:19:56.0,2000-05-24

LOGging:AUTomatic:STATus?Return the Auto-Log status for a preselected tag number

Returns a 0 if an Auto-Log session is not running, or a 1 if an Auto-Log session is running.



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Example: LOG:AUT:STAT?

Response: 0

LOGging:AUTomatic:STATus <bool>Set the Auto-Log status for a preselected tag number

The <bool> parameter turns auto logging on if set to 1, or off if set to 0. If another tag is presently being logged, it is automatically stopped.


Error ‘-221,”Settings conflict”’ is queued if the data logging storage is corrupt, if no tag is selected with LOG:AUT:LAB, or if the LOG or any recall menu display is active.

Example: LOG:AUT:STAT 0

LOGging:AUTomatic:TIMe?Return the Auto-Log interval.

Returns AUTO, 1, 2, 5, 10, 30, or 60. Numeric intervals are expressed in seconds.


Example: LOG:AUT:TIM?

Response: 1

LOGging:AUTomatic:TIMe <rate>Set the Auto-Log interval.

The <rate> parameter must be one of the following values: AUTO, 1, 2, 5, 10, 30, or 60. Numeric intervals are expressed in seconds. AUTO logs unique values as often as they are available.

Error ‘-221,”Settings conflict”’ is queued if the data logging storage is corrupt, if the LOG menu is active, or if data logging is active.

Example: LOG:AUT:TIM 1

LOGging:AUTomatic:VALue? <num>Return the specified Auto-Log entry for a preselected tag number.

The <num> parameter specifies the Auto-Log entry to return. Specifying 0 returns the first (oldest) log entry. Specifying a value greater than the number of logged points returns the last log entry.

Each data line includes the default or user defined tag name, the channel number, the primary value and units, and the time and date. When both channels are active, records


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for each channel alternate. When only one channel is active, no records are sent for the inactive channel.



Example: LOG:AUT:VAL? 10

Response:

DATA_25,1,23.220,C,15:19:46.7,2000-05-24

DATA_25,2,23.220,C,15:19:46.7,2000-05-24

LOGging:DEMand:DELeteDelete all entries from the demand log.

Error ‘-221,”Settings conflict”’ is queued if the data logging storage is corrupt, or if the demand recall or demand delete display is active.

Example: LOG:DEM:DEL

LOGging:DEMand:FREE?Return the number of demand log entries free, and in use

The response consists of the number free entries, followed by the number of used entries, separated by a comma.


Example: LOG:DEM:FREE?

Response: 8,17

LOGging:DEMand:POINt?Return the number of demand log entries already stored.


Example: LOG:DEM:POIN?

Response: 17

LOGging:DEMand:PRINtSend all demand log entries.

This example shows the 1524 return data. A single channel, and no time and date, are shown on the 1523 return data.

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Each data line includes the default or user defined demand log description, the channel number, the primary value and units, and on the 1524 the time and date. When both channels are active, records for each channel alternate. When only one channel is ac-tive, no records are sent for the inactive channel.


Example: LOG:DEM:PRIN

Response:

DTEST,1,22.676,C,15:19:42,2000-05-24

DTEST,2,9.960,KO,15:19:44,2000-05-24

DTEST,1,23.220,C,15:19:46,2000-05-24

DTEST,2,23.245,C,15:19:48,2000-05-24

DTEST,1,22.765,C,15:19:52,2000-05-24

DTEST,2,9.962,KO,15:19:54,2000-05-24

DTEST,1,23.087,C,15:19:56,2000-05-24

DTEST,2,23.260,C,15:19:58,2000-05-24

LOGging:DEMand:VALue? <num>Return the specified demand log entry.

The <num> parameter specifies the demand log entry to return, 1 to 25. Specifying 0 returns the first (oldest) log entry. Specifying a value greater than the number of logged points returns the last log entry.

The example shows the 1524 return data. A single channel, and no time and date, are shown on the 1523 return data.

Each data line includes the default or user defined demand log description, the channel number, the primary value and units, and on the 1524 the time and date. When both channels are active, records for each channel alternate. When only one channel is ac-tive, no records are sent for the inactive channel.


Example: LOG:DEM:VAL? 10

Response:

DTEST,1,125.820,C,15:19:46,2000-05-24

DTEST,2,23.220,C,15:19:46,2000-05-24

LOGging:DEMand:STATistic<n>? <num>Return the specified demand log statistical or auxiliary value for the specified demand log entry.


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The STATistic suffix, <n>, specifies the demand log statistical type number as listed in Table 23 on page 75. Defaults to 1 if omitted.

The <num> parameter specifies the demand log entry to return, 1 to 25. Specifying 0 returns the first (oldest) log entry. Specifying a value greater than the number of logged points returns the last log entry.

The example shows the 1524 return data. A single channel, and no time and date, are shown on the 1523 return data.

Each data line includes the default or user defined demand log description, the channel number, the requested value and units, and on the 1524 the time and date. When both channels are active, records for each channel alternate. When only one channel is ac-tive, no records are sent for the inactive channel.


Example: LOG:DEM:STAT2? 10

Response:

DTEST,1,803.220,C,15:19:46,2000-05-24

DTEST,2,-157.158,C,15:19:46,2000-05-24

LOGging:LABel<n>:NAME?Return the user defined tag name of the specified auto logging tag number, or the demand log user defined name.

If the LABel suffix, <n>, is supplied, it specifies the auto logging tag number of the user defined tag name to return, 1 to 25. If no user defined name has been entered for the tag number, the default tag name DATA_nn is returned.

If no suffix is supplied, the demand log user defined name is returned. If no user defined name has been entered for the demand log, the default name DEMAND is returned.


Example: LOG:LAB18:NAME?

Response: DATA_18

LOGging:LABel<n>:NAME <label>Set the user defined tag name of the specified auto logging tag number, or the demand log user defined name.

If the LABel suffix, <n>, is supplied, it specifies the auto logging tag number of the new name, 1 to 25.

If no suffix is supplied, the new name is saved for the demand log.

The <name> parameter can be up to 8 characters in length and can include any upper case letters, numeric digits, and the underscore (‘_’).

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Example: LOG:LAB18:NAME BATH

MEASure? <prb>Return the last measurement for the specified probe, with units according to the UNIT:TEMP setting if it is a temperature.


If there is no valid measurement available the response is “0.0,OL”.

Example: MEAS? 1

Response: 0.127

READ? <prb>Return the last measurement for the specified probe, with units according to the UNIT:TEMP setting if it is a temperature.


If there is no valid measurement available the response is “0.0,OL”.

Example: READ? 2

Response: 55.011

SENSe<prb>:DATA:MV?Return the present direct or thermocouple millivolt reading for the specified probe.

The SENSe suffix, <prb>, specifies the probe, 1 or 2. Defaults to 1 if omitted.

The response is expressed in millivolts. If there is no valid measurement available the response is “0.0,OL”.

If the presently selected input type is not millivolts or thermocouple, there will be no response and error ‘-221,"Settings conflict"’ will be queued.

Example: SENS2:DATA:MV?

Response: 7.356895

SENSe<prb>:DATA:OHMS?Return the present direct, PRT, RJ, or thermistor ohms reading for the specified probe.

The SENSe suffix, <prb>, specifies the probe, 1 or 2. Defaults to 1 if omitted.

The response is expressed in ohms. For a thermocouple probe, the response is the reference junction ohms value. If there is no valid measurement available the response is “0.0,OL”.


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If the presently selected input type is millivolts, there will be no response and error ‘-221,"Settings conflict"’ will be queued.

Example: SENS2:DATA:OHMS?

Response: 100.45

SENSe:DATA:RJ?Return the present internal or external reference junction temperature reading for the specified probe.

The response is expressed in degrees Celsius.

If the presently selected input type is not millivolts or thermocouple, there will be no response and error ‘-221,"Settings conflict"’ will be queued.

Example: SENS:DATA:RJ?

Response: 23.568

SENSe:RJ:STATe?Return the state of the reference junction for a given probe.

The response is OFF (no compensation), ON (automatic internal compensation), or EXT (external compensation). If EXT is selected, the SENS:RJ:TEMP command must be used to set the external compensation temperature.

Example: SENS:RJ:STAT?

Response: EXT

SENSe:RJ:TEMPerature?Return the external reference junction temperature for a given probe.

The response is expressed in degrees Celsius.

Example: SENS:RJ:TEMP?

Response: 22.731

SENSe:RJ:TEMP <val>Set the external reference junction temperature for a given probe.

The parameter <val> is expressed in degrees Celsius, and may range from -10C to 60C.

Example: SENS:RJ:TEMP 23.123

STATus:MEASure:EVENt?Read and clear the Measurement Event Register, indicating whether or not a new mea-surement is available to be read.

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The bit assignments are as follows:

bit 0: probe 1 new measurement

bits 1 to 7: not used

bit 8: probe 2 new measurement


Example: STAT:MEAS?

Response: 257

STATus:MEASure:CONDition?Return the Measurement Condition Register, indicating whether or not measuring is active.

The bit assignments are the same as for STATus:MEASure?

Example: STAT:MEAS:COND?

Response: 257

STATus:MEASure:ENABle?Return the Measurement Event Enable Register.

The bit assignments are the same as for STATus:MEASure?.

Example: STAT:MEAS:ENAB?

Response: 0

STATus:MEASure:ENABle <num>Set the Measurement Event Enable Register.

The <num> parameter specifies the event enable bits which are to be set, 0 to 65535 decimal. The bit assignments are the same as for STATus:MEASure?

Example: STAT:MEAS:ENAB 257

STATus:QUEStionable:EVENt?Read and clear the Questionable Event Register, indicating any measurement warnings.

The bit assignments are as follows:

bit 0: probe 1 not inserted

bit 1: probe 1 measurement under range

bit 2: probe 1 measurement over range

bit 3: probe 1 EEPROM fault (bad checksum or version number is not supported)


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bit 4: probe 1 locked


bit 8: probe 2 not inserted

bit 9: probe 2 measurement under range

bit 10: probe 2 measurement over range

bit 11: probe 2 EEPROM fault (bad checksum or version number is not supported)

bit 12: probe 2 locked


bit 15: Data logging EEPROM initialization failure

Example: STAT:QUES?

Response: 256

STATus:QUEStionable:CONDition?Return the Questionable Condition Register, indicating any measurement warning conditions.

The bit assignments are the same as for the STATus:QUEStionable?.

Example: STAT:QUES:COND?

Response: 256

STATus:QUEStionable:ENABle?Return the Questionable Event Enable Register.

The bit assignments are the same as for STATus:QUEStionable?

Example: STAT:QUES:ENAB?

Response: 0

STATus:QUEStionable:ENABle <num>Set the Questionable Event Enable Register.

The <num> parameter specifies the event enable bits which are to be set, 0 to 65535 decimal. The bit assignments are the same as for the STATus:QUEStionable?.

Example: STAT:QUES:ENAB 1799

SYSTem:COMMunicate:SERial:BAUD?Return the present serial port baud rate setting.

The response is the present baud rate setting.

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Example: SYST:COMM:SER:BAUD?

Response: 9600

SYSTem:COMMunicate:SERial:BAUD <baud>Set the serial port baud rate.

The <baud> parameter is the new baud rate, 2400 or 9600.

After this command is sent, the remote program must switch to the same baud rate for all commands sent to the unit.

Example: SYST:COMM:SER:BAUD 2400

SYSTem:COMMunicate:SERial:OFFTurn off the serial port.

After this command is sent, the unit will not respond to any further commands. The port control item on the Instrument Setup screen of the unit must be used to turn the serial port back on.

Example: SYST:COMM:SER:OFF

SYSTem:DATE? Return the date.

The response is returned in the format <year>,<month>,<day>.

This command is only available in the model 1524, and results in a command error if used with the model1523.

Example: SYST:DATE?

Response: 2000,9,22

SYSTem:DATE <year>,<month>,<day>Set the date.

The <year> parameter is a four-digit number, 2000 to 2099.

The <month> parameter is a one or two-digit number, 1 to 12.

The <day> parameter is a one or two-digit number. 1 to 31.



70

Example: SYST:DATE 2000,8,29

SYSTem:ERRor?Return a system error message if any are present in the system error queue, otherwise it returns 0,”No error”.

The error queue may contain up to ten messages. The messages are reported in the order in which they occurred. Reading a message from the queue removes the message so that the next message can be read. If more than ten errors occur before being read, the most recent is replaced by -350,“Queue overflow”. Possible error messages are listed in Table 24 on page 75.

Example: SYST:ERR?

Response: 0,”No error”

SYSTem:PASSword:CDISableDisable access to password protected commands.

Example: SYST:PASS:CDIS


SYSTem:PASSword:CENable <pass>Enable access to password protected commands.

The <pass> parameter is the present password.

Example: SYST:PASS:CEN 1234


SYSTem:PASSword:CENable:STATe?Return present state of password protection.

The response is 0 if password protection is disabled, or 1 if it is enabled.

Example: SYST:PASS:CEN:STAT?

Response: 0

SYSTem:PASSword:NEW <pass>Set new password.

The <pass> parameter is the new password. It can be up to 10 characters in length and can include any upper case letters, numeric digits, and the underscore (‘_’).

The default password at time of shipping is 1234.

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Example: SYST:PASS:NEW 4321



Error ‘-203,”Command protected”’ is queued if the old password has not been entered with SYST:PASS:CEN.

SYSTem:SNUMber?Return the device serial number.

If the serial number has not been set at the factory, a 0 is returned.

Example: SYST:SNUM?

Response: 509002

SYSTem:TIME?Return the current system time in 24 hour format.

The response is returned in the 24 hour format, <hour>,<minute>,<second>.


Example: SYST:TIME?

Response: 18,43,23

SYSTem:TIME <hour>,<minute>,<second>Set the current system time.

The <hour>, <minute>, and <second> parameters must all be supplied.

The <hour> parameter is a one or two-digit number, 0 to 23.

The <minute> parameter is a one or two-digit number, 0 to 59.

The <second> parameter is a one or two-digit number 0 to 59.


Example: SYST:TIME 18,43,23

SYSTem:VERSion?Return the SCPI version number.


72

Example: SYST:VERS?

Response: 1999.0

UNIT:TEMPerature?Return the temperature unit.

The response is either C for Celsius or F for Fahrenheit.

Example: UNIT:TEMP?

Response: C

UNIT:TEMPerature <unit>Set the temperature unit.

The <unit> parameter is either C for Celsius or F for Fahrenheit.

Example: UNIT:TEMP C

Table 19 Statistical Types

Number Type Keyword

1 Maximum MAX

2 Minimum MIN

3 Average AVE

4 Standard Deviation STD

5 Delta X DX

6 Delta T DT

Table 20 Probe Conversion Types

Probe Conversion Keyword

PRT ITS90 ITS

ITS90-5 ITS5

CVD CVD

PT100 RPRT

Resistance TRES

Thermistor Polynominal R(T) TRES

Resistance RTHM

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Probe Conversion Keyword

Thermocouple Millivolts V

B B

C C

E E

J J

K K

L L

M M

N N

R R

S S

T T

U U

Table 21 Probe Characterization Parameters

Conversion Keyword Value

ITS90 RTPW Double Floating Point

A Double Floating Point

B Double Floating Point

C Double Floating Point

D Double Floating Point

A4 Double Floating Point

B4 Double Floating Point

MINOP Integer, °C

MAXOP Integer, °C

ITS90-5 RTPW Double Floating Point






MINOP Integer, °C

MAXOP Integer, °C

CVD R0 Double Floating Point




MINOP Integer, °C

MAXOP Integer, °C


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Conversion Keyword Value

PT100 R0 Double Floating Point

MINOP Integer, °C

MAXOP Integer, °C

Resistance MINOP Integer, Ω

MAXOP Integer, Ω

Polynomial R(T) B0 Double Floating Point




MINOP Integer, °C

MAXOP Integer, °C

Thermocouple, mV

MINOP Integer, mV

mV MAXOP

Thermocouple, other

C0 Double Floating Point

other C1



B0 Double Floating Point, internal RJ only




RJTYPE 0 external, 1 internal

RJTEMP Double Floating Point, External temperature, °C

MINOP Integer, °C

MAXOP Integer, °C

Table 22 Calibration Range Identifiers

Range Keyword

Normal operation NORMAL

Millivolts calibration MV

Reference junction calibration RJ_OHMS

Very Low Ohms calibration L75_OHMS

Low Ohms calibration LO_OHMS

Medium Ohms calibration MED_OHMS

High Ohms calibration HI_OHMS

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Table 23 Demand Log Statistical Types

Number Type

1 Maximum

2 Minimum

3 Average

4 Standard Deviation

5 Auxiliary Value

For all query commands, when an error is detected and an error message is placed in the queue, no response is returned for the query.

For all action commands, when an error is detected and an error message is placed in the queue, no action is taken.

If a thermocouple is inserted into channel 2, all commands except the SYST:ERR query command place the error ‘-221, “Settings conflict”’ in the queue. This action complements the full lockout of all the keypad keys in this same circumstance.

Error messages are retrieved from the queue using the SYST:ERR query.

Table 24 Error Messages

Number Message

0 "No error"

-100 "Command error"

-200 "Execution error"

-203 "Command protected"

-221 “Settings conflict”

-350 "Queue overflow"

-360 "Communication error"

-363 "Input buffer overrun"

77

Calibration of Your Reference Thermometer ReadoutCalibration Equipment

7 Calibration of Your Reference Thermometer Readout

General7.1 NOTE: For assistance with the process or any questions regarding the calibration of the Reference Thermometer, contact an Authorized Service Center. (See Section 1.8, Authorized Service Centers on page 4.)

This procedure is to be considered a general guideline. Each laboratory should write their own procedure based on their equipment and their quality program. Each proce-dure should be accompanied by an uncertainty analysis also based on the laboratory’s equipment and environment.

The 1523/24 Reference Thermometers are calibrated with a traceable calibration at the factory. This calibration is supported by good practices including an extensive uncertainty budget.

Introduction7.2 The reference resistors and voltage source must have low enough uncertainties to fit within your uncertainty budget. These uncertainties consist of a number of items including temperature coefficients and long term drift. There are other uncertainties to consider as well.

Terminology7.3 NOTE: The Unit Under Test is referred to as the (UUT).

Fundamentals7.4 It is assumed that the user is familiar with the 1523/24 Reference Thermometer User’s Guide and Technical Guide.

The user shall be familiar with 4 wire and 2 wire resistance connections.

The user shall be familiar with the voltage source.

Environmental Test Conditions7.5 Temperature range: 23°C ± 4°C

Ambient relative humidity: below 60%

7.6 Calibration EquipmentThe tables below describe the equipment needed to perform a 1523/24 reference ther-mometer calibration. The specifications for the reference resistors and voltage source are minimum requirements to meet a test uncertainty ratio (TUR) of 4 to 1.

1523, 1524 Reference ThermometerManual Calibration

78

Test Equipment SpecificationsTable 25

Classification Minimum Use Recommended Equipment

Voltage Source ± 6ppm ± 0.6uV Fluke 5700

4 wire Reference Resistors See Total Uncertainty column Table X

Vishay VHP100 Resistors

4 wire cable Low resistance, Low EMF N/A

Lemo Connector 6 pin LEMO PAG.M0.6GL.AC39G

Standard Reference Resistor SpecificationTable 26

US1 (k=2) US2 (k=2) UT (k=2)

Resistance

Reference Resistor

Uncertainty (ppm)

Reference Resistor

Uncertainty (Ω)

TCR Uncertainty

(ppm)TCR

Uncertainty (Ω)Total

Uncertainty (Ω)

Total Uncertainty

(ppm)

0 -- 0.00004 -- -- 0.000540 --

25 28 0.0007 0.3 0.0000075 0.000700 28.0016

75 15.73 0.00117975 0.3 0.0000225 0.001180 15.7329

100 14 0.0014 0.3 0.00003 0.001400 14.0032

200 11.5 0.0023 0.3 0.00006 0.002301 11.5039

400 10.25 0.0041 0.3 0.00012 0.0041 10.2544

10000 35 0.35 0.3 0.003 0.3500 35.0013

40000 26.25 1.05 0.3 0.012 1.0501 26.2517

100000 74 7 0.3 0.03 7.0001 70.0006

300000 70 21 0.3 0.09 21.0002 70.0006

500000 70 35 0.3 0.15 35.0003 70.0006

Standard Voltage Reference SpecificationTable 27

Voltage mVReference Voltage Total

Uncertainty (mV)

–10 0.00125

0 0.00110

25 0.00145

75 0.00210

Manual Calibration7.7

General7.7.1 This procedure outlines a manual process that closely follows the way the Reference Thermometer was calibrated at the factory. The user should adjust their calibration process to meet the needs of their facility and process. The following flow charts sum-marizes the process.

79

Calibration of Your Reference Thermometer ReadoutManual Calibration

Prepare Test Equipment

VisualInspection

Need As-Found data?

As-Found Data

ParametersYes

As-Found Test Data

Set Reference Points and Reset

Adj Values

No

Take Alignment Data

Calculate New Adj Values

As Left Accuracy Data

Finished

Figure 17 Flow chart for manual calibration

1523, 1524 Reference ThermometerPreparation for Reference Thermometer Calibration

80

As Found Data Procedure7.7.2 As Found data is used to determine if the readings and measurements taken since the last calibration are within specification. The data is also used to determine the amount of “drift” (how much the accuracies have changed over time) that the instrument has undergone.

As Found Calibration Parameters7.7.2.1

Recording the as found calibration parameters allows the user to compare the current parameters to the parameters set during the last calibration.

7.7.2.2 As Found Data

The data taken at this step allows the user to compare the results to the previous calibration.

7.7.3 Alignment ProcedureThe alignment procedure aligns each of the reference thermometer’s ranges to a set of known reference voltage and resistance standards. Reference points and their adjust-ment values are reset.

7.7.3.1 Alignment Test Data

Once the reference points have been set and their adjustment points reset to zero, data at each calibration point is taken for each of the voltage and resistance ranges.

Calculate New Adjustment Values7.7.3.2

The alignment test data is used to calculate new Adjust (ADJ) values for each range based on the errors of certain cal points.

7.7.4 As Left DataData at each calibration point is taken for each of the voltage and resistance ranges and compared to the accuracy specifications. The standard deviation of the readings is calculated to ensure that it meets the specification.

Preparation for Reference Thermometer Calibration7.8

7.8.1 Serial CommunicationEnable the serial port of the UUT by pressing the SETUP key. Press NEXT to high-light Select Instrument then press ENTER. Press NEXT until the parameter Serial Port is shown. Toggle the up / down keys to select On and press ENTER. Press SETUP or HOME to return to the main screen.

81

Calibration of Your Reference Thermometer ReadoutManual Calibration Process

Cabling 7.8.2 Use short (<1 meter) four-wire cabling from the UUT to the resistance and voltage ref-erences. The cabling should be connected to a Lemo Connector that does not contain a probe memory IC.

The 4-wire resistance connection uses pins 1 and 2 for one side of the reference resis-tor and pins 3 and 4 for the other side.

For the voltage calibration, connect only pins 2 and 3 to the voltage source. Pin 3 is the positive terminal and pin 2 is the negative terminal.

The thermocouple reference junction resistance test uses pins 1 and 4 to connect to the 10K reference resistor. This is a two wire connection for this test; DO NOT connect any other pins.

Scan Mode7.8.3 The UUT must have the Fast Scan Mode and the Auto-Off mode turned off. Refer to the Instrument Settings menu.

7.8.4 AC AdapterThe UUT can be calibrated with or without the AC adapter. If using batteries, ensure they are new before starting the calibration procedure.

Manual 7.9 Calibration ProcessNOTE: 1. The 1523/24 is tested and calibrated using the tests outlined below in the order indicated. Details on performing each of the tests can be found in the subsequent section of this document. 2. For test specifications, durations, soak times, and other detailed information, refer to the specification tables below.

1523/24 Accuracy Test Settings and SpecificationsTable 28

Resistance Range

Reference (Nominal) (Ω) Soak (Sec) Samples

Spec (±Ω)

Std Dev Spec (±Ω)

L75_OHMS 0 20 40 0.002 0.0005

25 20 40 0.003 0.00075

75 20 40 0.005 0.00125

LO_OHMS 75 20 40 0.005 0.00125

100 20 40 0.006 0.0015

200 20 40 0.01 0.0025

400 20 40 0.018 0.0045

MED_OHMS 200 20 40 0.52 0.13

400 20 40 0.54 0.135

10k 20 40 1.5 0.375

40k 20 40 4.5 1.125

1523, 1524 Reference ThermometerManual Calibration Process

82

Resistance Range

Reference (Nominal) (Ω) Soak (Sec) Samples

Spec (±Ω)

Std Dev Spec (±Ω)

HI_OHMS 40k 20 40 12.0 3.0

100k 20 40 30.0 7.5

300k 20 40 90.0 22.5

500k 20 40 150.0 37.5

RJ_OHMS 10k 20 40 5.0 1.25

1523/24 Accuracy Test Settings and Specifications – VoltageTable 29

Reference (Nominal) (mV)

Soak (Sec) Samples

Spec (±mV)

StdDev Spec

(± mV)

-10 20 40 0.0055 0.00138

0 20 40 0.005 0.00125

25 20 40 0.0063 0.00156

75 20 40 0.0088 0.00219

Procedure7.9.1

7.9.1.1 Visual Inspection

Perform a visual inspection of the UUT for signs of physical damage. If a problem is found, correct it before proceeding with the test., Contact an Authorized Service Cen-ter for repair or recalibration before proceeding.

1523/24 7.9.1.2 Calibration Parameters (As Found)

NOTE: If not taking As Found data, skip to the 1523/24 alignment section.

When the calibration process must collect As Found data, the following UUT configu-ration and control settings must remain at their current values until all As Found data has been collected. See table below.

As Found Readout/Calibration Parameter SettingsTable 30

Parameter Description

# of Cal Ref Points Each Cal Range has 1 to 4 Ref Cal Points

Cal Ref Points Reference values set to each cal point

Cal Adj values Offsets used at each Cal Ref point

Using a terminal program set the terminal program communication settings to:1.

Baud 9600

Parity None

Flow Control None

Stop Bits 1

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Set the UUT password enable by sending the following commands through the 2. serial port:

SYST:PASS:CEN XXXX (XXXX is the current UUT password)Query the password enable to ensure communication is working and that it is enabled before continuing. Do this by sending the following command:SYST:PASS:CEN?The returned value should be a 1. If not recheck the serial cable connection and the terminal program communication settings listed in step 1.Set the UUT to the L75_OHMS cal range by sending the following commands 3. through the serial port:

CAL1:DEV:RANG:SEL L75_OHMSQuery the Ref points by sending the following Command:4.

CAL1:DEV:RANG:REF?Query the ADJ values for the range by sending the following Command:5.

CAL1:DEV:RANG:ADJ?The ADJ values will be in order of the ref points queried in the previous step.Set the UUT in the LO_OHMS cal range by sending the following commands 6. through the serial port:

CAL1:DEV:RANG:SEL LO_OHMSQuery the Ref points by sending the following Command:7.


CAL1:DEV:RANG:ADJ?The ADJ values will be in order of the ref points queried in the previous step.Set the UUT in the MED_OHMS cal range by sending the following commands 9. through the serial port:

CAL1:DEV:RANG:SEL MED_OHMSQuery the Ref points by sending the following Command:10.


CAL1:DEV:RANG:ADJ?The ADJ values will be in order of the ref points queried in the previous step.Set the UUT in the HI_OHMS cal range by sending the following commands 12. through the serial port:

CAL1:DEV:RANG:SEL HI_OHMSQuery the Ref points by sending the following Command:13.


CAL1:DEV:RANG:ADJ?


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The ADJ values will be in order of the ref points queried in the previous step.Set the UUT in the MV_OHMS cal range by sending the following commands 15. through the serial port:

CAL1:DEV:RANG:SEL MV_OHMSQuery the Ref points by sending the following Command:16.


CAL1:DEV:RANG:ADJ?The ADJ values will be in order of the ref points queried in the previous step.Record the as found alignment parameters.18.

1523/24 7.9.1.3 Accuracy Test (As Found)

Connect the calibration cable, described in the Preparation and Settings for 19. Reference readout Calibration section, to Channel T1 of the UUT. Using a terminal program set the terminal program communication settings to:

Baud 9600

Parity None

Flow Control None

Stop Bits 1

Connect an electrical short (less than 0.0005420. Ω) to all 4 wires of the calibration cable connected to the UUT.

Set the UUT password enable by sending the following commands through the 21. serial port:

SYST:PASS:CEN XXXX (XXXX is the current UUT password)Query the password enable to ensure communication is working and that it is 22. enabled before continuing. Do this by sending the following command:

SYST:PASS:CEN?The returned value should be a 1. If not recheck the serial cable connection and the terminal program communication settings listed in step 1.

7.9.1.3.1 L75 Ohms Range

Set the UUT in the L75_OHMS cal range by sending the following commands 23. through the serial port:

CAL1:DEV:RANG:SEL L75_OHMS

Query the reading every 2 seconds for 40 readings using the following 24. command:

MEAS?

Record the data.

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Connect a 25 Ohm resistor (28 ppm) to the calibration cable connected to the 25. UUT.


MEAS?Record the data. Connect a 75 Ohm resistor to the calibration cable connected to the UUT.27.


MEAS?Record the data.

7.9.1.3.2 Lo Ohms Range

Set the UUT in the LO_OHMS cal range by sending the following commands 29. through the serial port:

CAL1:DEV:RANG:SEL LO_OHMSConnect a 75 Ohm resistor to the calibration cable connected to the UUT.30.




MEAS?Record the data.Connect a 200 Ohm resistor to the calibration cable connected to the UUT.34.





Note: Steps 38 through 41 apply to the 1524 only. Proceed to step 42 if using a 1523.

(1524 ONLY)38. Set Channel T2 of the UUT in the LO_OHMS cal range by sending the following commands through the serial port:

CAL2:DEV:RANG:SEL LO_OHMS


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Turn off T1 by sending the following command.39.

CAL1:DEV:RANGE:SEL NORMALDisconnect resistor.Connect a 100 Ohm resistor to the calibration cable connected to the UUT on 40. Channel T2.


MEAS? 2Record the data. Turn off Channel T2 by sending the serial command:42.

CAL2:DEV:RANG:SEL NORMALConnect the calibration cable to Channel T1.

7.9.1.3.3 Medium Ohms Range

Set the UUT in the MED_OHMS cal range by sending the following commands 43. through the serial port:

CAL1:DEV:RANG:SEL MED_OHMSConnect a 200 ohm resistor to the calibration cable connected to the UUT.44.




MEAS?Record the data. Connect a 10K Ohm resistor to the calibration cable connected to the UUT. 48.


MEAS?Record the data. Connect a 40K Ohm resistor to the calibration cable connected to the UUT.50.


MEAS?Record the data. (1524 ONLY) 52. Set Channel T2 of the UUT in the MED_OHMS cal range by sending the following commands through the serial port:

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CAL2:DEV:RANG:SEL MED_OHMSTurn off T1 by sending the following command.53.

CAL1:DEV:RANGE:SEL NORMALDisconnect resistor.Connect a 10K Ohm resistor to the calibration cable connected to the UUT on 54. Channel T2.




7.9.1.3.4 High Ohms Range

Set the UUT in the HI_OHMS cal range by sending the following commands 57. through the serial port:

CAL1:DEV:RANG:SEL HI_OHMSConnect a 40K Ohm resistor to the calibration cable connected to the UUT.58.




MEAS?Record the data.Connect a 300K Ohm resistor to the calibration cable connected to the UUT.62.





Note: Steps 64 through 67 apply to the 1524 only. Proceed to step 68 if using a 1523.


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(1524 ONLY)66. Set Channel T2 of the UUT in the HI_OHMS cal range by sending the following commands through the serial port:

CAL2:DEV:RANG:SEL HI_OHMSConnect a 100K Ohm resistor to the calibration cable connected to the UUT on 67. Channel T2.

Turn off T1 by sending the following command.68.

CAL1:DEV:RANGE:SEL NORMALDisconnect resistor.Query the reading every 2 seconds for 40 readings using the following 69. command:



7.9.1.3.5 Millivolt Range

Set the UUT in the mV cal range by sending the following commands through 71. the serial port:

CAL1:DEV:RANG:SEL MVConnect the voltage source to the calibration cable as described in the 72. Preparation & Settings for Reference readout Calibration section.

Set the output of the voltage source to -10 mV.73.


MEAS?Record the data. Set the output of the voltage source to 0 mV.75.






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7.9.1.3.6 Reference Junction Ohms Range

Set the UUT in the RJ_OHMS cal range by sending the following commands 81. through the serial port:

CAL1:DEV:RANG:SEL RJ_OHMSConnect a 10K Ohm resistor to the calibration cable connected to the UUT. 82. NOTE: Only connect pins 1and 4 to the 10K Reference resistor. This is a 2 wire test.


MEAS?Record the data. For all As Found data, calculate the average and standard deviation for each 84. set of data. Compare the standard deviation to the specification. If the UUT does not meet the standard deviation specification, re-take data at the suspect range(s). If the data is still exceeds the specification, contact an Authorized Service Center for assistance. Verify the average of each data set is less than the Accuracy limit listed in the Accuracy Test Settings and Specification tables.

7.9.2 1523/24 AlignmentPrior to performing the alignment, the following UUT configuration and control set-tings must be set to the values indicated in the 1523/24 Alignment Settings table.

Caution: Failure to do this will cause large errors in the measurement readings and invalidate the calibration.

1523/24 Alignment SettingsTable 31

Setting Cal Range Value Description

NUM MV 2 MV Range # of cal points

NUM L75_OHMS 2 L75_OHMS Range # of cal points

NUM LO_OHMS 2 LO_OHMS Range # of cal points

NUM MED_OHMS 2 MED_OHMS Range # of cal points

NUM HI_OHMS 2 HI_OHMS Range # of cal points

Ref1, Ref2 MV 0, 75 mV Ref Calibration points

Ref1, Ref2 L75_OHMS 0, 75 L75_OHMS Ref Calibration points

Ref1, Ref2 LO_OHMS 75, 400 LO_OHMS Ref Calibration points

Ref1, Ref2 MED_OHMS 400, 40000 MED_OHMS Ref Calibration points

Ref1, Ref2 HI_OHMS 40000, 500000 HI_OHMS Ref Calibration points

Adj1 & Adj2 MV 0,0 MV Ref Point Adjustment Values


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Setting Cal Range Value Description

Adj1 & Adj2 L75_OHMS 0,0 L75_OHMS Ref Point Adjustment Values

Adj1 & Adj2 LO_OHMS 0,0 LO_OHMS Ref Point Adjustment Values

Adj1 & Adj2 MED_OHMS 0,0 MED_OHMS Ref Point Adjustment Values

Adj1 & Adj2 HI_OHMS 0,0 HI_OHMS Ref Point Adjustment Values

NOTE: All serial commands below must be sent in the order shown. Not doing so will cause other calibration parameters to change values. This produces large errors in the calibration.

Using a terminal program set the terminal program communication settings to:1.

Baud 9600

Parity None

Flow Control None

Stop Bits 1

Plug the provided serial communications cable into the UUT. Set the number of Ref points to 2 for each range by sending the following serial 2. commands.

SYST:PASS:CEN XXXX (where XXXX is the current UUT password)CAL:DEV:RANG:SEL L75_OHMSCAL:DEV:RANG:NUM 2CAL:DEV:RANG:SEL LO_OHMSCAL:DEV:RANG:NUM 2CAL:DEV:RANG:SEL MED_OHMSCAL:DEV:RANG:NUM 2CAL:DEV:RANG:SEL HI_OHMSCAL:DEV:RANG:NUM 2CAL:DEV:RANG:SEL MVCAL:DEV:RANG:NUM 2Set all Reference points to their designated values (see table 1523/24 Alignment 3. settings XXX) for each range by sending the following commands:

CAL:DEV:RANG:SEL L75_OHMSCAL:DEV:RANGE:REF1 0.0CAL:DEV:RANGE:REF2 75.0CAL:DEV:RANG:SEL LO_OHMSCAL:DEV:RANGE:REF1 75.0CAL:DEV:RANGE:REF2 400.0CAL:DEV:RANG:SEL MED_OHMS

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CAL:DEV:RANGE:REF1 400CAL:DEV:RANGE:REF2 40000CAL:DEV:RANG:SEL HI_OHMSCAL:DEV:RANGE:REF1 40000CAL:DEV:RANGE:REF2 500000CAL:DEV:RANG:SEL MVCAL:DEV:RANGE:REF1 0.0CAL:DEV:RANGE:REF2 75Set all adjustment parameters to 0.0 for each range by sending the following 4. commands:

CAL:DEV:RANG:SEL L75_OHMSCAL:DEV:RANGE:ADJ1 0.0CAL:DEV:RANGE:ADJ2 0.0CAL:DEV:RANG:SEL LO_OHMSCAL:DEV:RANGE:ADJ1 0.0CAL:DEV:RANGE:ADJ2 0.0CAL:DEV:RANG:SEL MED_OHMSCAL:DEV:RANGE:ADJ1 0.0CAL:DEV:RANGE:ADJ2 0.0CAL:DEV:RANG:SEL HI_OHMSCAL:DEV:RANGE:ADJ1 0.0CAL:DEV:RANGE:ADJ2 0.0CAL:DEV:RANG:SEL MVCAL:DEV:RANGE:ADJ1 0.0CAL:DEV:RANGE:ADJ2 0.0Take alignment data by following (or repeating) the steps in the As Found Data 5. section. Do not take alignment data for Channel T2.

Calculate the average and the standard deviation of the alignment data.. 6.

Calculate the adjustment values for each range and record the value using the 7. formula below:

ADJx = average – nominalX represents which ADJ value for that range, 1 or 2 Average is the average of the 40 measured samples at one reference point.Nominal is the exact known value of the reference resistor or voltage source.The following are the individual formulas for each ADJ value:

7.9.2.1 L75_OHMS Range

ADJ1 = ave0 Ω – 0 Ω nominal


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7.9.2.2 LO_OHMS Range



MED_OHMS Range7.9.2.3

ADJ1 = ((ave400Ω – 400Ω nominal) + ((ave40,0000Ω – 40,000Ω nominal)*0.005)+ (ave200Ω – 200Ω nominal))/2

ADJ2 = ave40,000Ω – 40,000Ω nominal

7.9.2.4 HI_OHMS Range

ADJ1 = ave40,000Ω – 40,000Ω nominal

ADJ2 = 0.8333 (ave300,000Ω – 300,000Ω nominal) + 0.5(ave500,000Ω – 500,000Ω nominal)

7.9.2.5 Millivolt Range

ADJ1 = ave0mV – 0mV nominal

ADJ2 = ave75mV – 75mV nominal

Send the calculated ADJ values from step 7 to the UUT using the following 8. serial commands. The XXXX represents the new calculated value.

CAL:DEV:RANG:SEL L75_OHMSCAL:DEV:RANGE:ADJ1 XXXXCAL:DEV:RANGE:ADJ2 XXXXCAL:DEV:RANG:SEL LO_OHMSCAL:DEV:RANGE:ADJ1 XXXXCAL:DEV:RANGE:ADJ2 XXXXCAL:DEV:RANG:SEL MED_OHMSCAL:DEV:RANGE:ADJ1 XXXXCAL:DEV:RANGE:ADJ2 XXXXCAL:DEV:RANG:SEL HI_OHMSCAL:DEV:RANGE:ADJ1 XXXXCAL:DEV:RANGE:ADJ2 XXXXCAL:DEV:RANG:SEL MVCAL:DEV:RANGE:ADJ1 XXXXCAL:DEV:RANGE:ADJ2 XXXX

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1523/24 7.9.3 As Left Test DataTake as Left data by following the steps in the As Found Data section. 1.

Calculate the average and the standard deviation of the measurements taken in 2. step 1, including the Channel T2 data. Record the results.

Compare the error with the specification in the Accuracy Test Setting and 3. Specification tables for each range to determine the pass/fail status. Record the result.

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Troubleshooting

8 TroubleshootingBelow are several situations that may arise followed by possible causes of the prob-lem and suggested actions. If you can not resolve the problem, contact an Authorized Service Center. (See Section 1.8, Authorized Service Centers on page 4.)

Problem Solution

“Battery Symbol” is displayed The battery is low and needs to be changed. When this symbol appears, the batteries should be replaced to ensure the accuracy of readings.

“Waiting for Data” is displayed when a probe is plugged in.

The instrument is unable to detect that a probe is connected. Check that a probe with a properly programmed INFO-CON connector is attached.

“locked” is displayed The incorrect probe is attached to the unit or channel in the case of the 1524. The meter is set to accept only the probe with the given serial number to the specified channel. Attach the correct probe or have the instrument properly programmed for the new probe. See Probe Lock Function section XXXX.

Cannot change INFO-CON settings using the 9940 software or manually through the serial port.

The pass code entered was not correct.. Note: The factory set pass code is 1234.

The instrument display is blank when it should show measurements.

Make sure the instrument has power, either from the batteries or the AC adapter. Verify that the initialization information appears on the display when the power is switched on. Check to make sure that a probe is properly connected. Check to make sure that the INFO-CON connector is programmed properly using the 9940 software.

While attempting to measure resistance the display shows an incorrect or erratic value.

Poor or incorrect connection of the probe. A common mistake is to connect the wires of the probe to the wrong terminals. Check the wiring carefully (see Figure XXX).Open, shorted, or damaged sensor or lead wires. Check the resistance across the sensor using a handheld digital multi-meter. Check the resistance between common pairs of leads. Check to make sure there is no conductivity between any of the leads and the probe sheath. Use a good-quality sensor to avoid errors caused by drift, hysteresis, or insulation leakage.Stem conduction error. Make sure the stem of the probe is immersed in the medium with adequate depth and a tight fit.Electrical interference. Intense radio frequency radiation near the thermometer or the probe can induce noise into the measurement circuits resulting in erratic readings. Try eliminating the source of interference or moving the thermometer to a different location.

97

Maintenance

9 MaintenanceThis instrument has been designed with the utmost care. Ease of operation and sim-plicity of maintenance have been a central theme in the product development. With proper care the instrument should require very little maintenance. Avoid operating the instrument in oily, wet, dirty, or dusty environments.

If the outside of the instrument becomes soiled, it may be wiped clean with a damp cloth and mild detergent. Do not use harsh chemicals on the surface which may dam-age the LCD or the plastic outside shell.

If a hazardous material is spilt on or inside the equipment, the user is responsible for taking the appropriate decontamination steps as outlined by the national safety council with respect to the material.

Before using any cleaning or decontamination method except those recommended by Fluke, users should check with an Authorized Service Center to ensure that the pro-posed method will not damage the equipment.

If the AC adapter becomes damaged, have it replaced immediately. Never disassemble the AC adapter or attempt to repair it.

If the instrument is used in a manner not in accordance with the equipment design, the operation of the thermometer may be impaired or safety hazards may arise.

Note: Use only AA alkaline batteries.

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Index

Symbols1523/24 Alignment 899940 software 43*CLS 49°F, °C 29*IDN? 49*RST 49Ω mV 36

AAC adapter 23, 97AC Adapter 81Accuracy Test 84action commands 75Alignment Procedur 80Alignment Test Data 80ARROWS, UP, DOWN 34As Found 82As Found Data 80As Left Data 80As Left Test Data 93Authorized Service Center 77Authorized Service Centers 4Auto Log 41Auto-Log 35, 37AUTO-LOG 39Auto-Off 33, 81

BBattery 23battery icon 23Baud Rate 34buffer capacity 44

CCALCulate:AVERage:CLEar 49CALCulate:AVERage<n>:TYPE? 50CALCulate<prb>:AVERage<n>:DATA? 50CALCulate<prb>:CONVert:DATE:CALibrate?

50

CALCulate<prb>:CONVert:DATE:CALibrate <year>,<month>,<day 50

CALCulate<prb>:CONVert:IDENtity? 53CALCulate<prb>:CONVert:IDENtity <num> 53CALCulate<prb>:CONVert:NAM <conv 51CALCulate<prb>:CONVert:NAMe? 50CALCulate<prb>:CONVert:PARameter:CATalo

g? 51CALCulate<prb>:CONVert:PARameter:VALue?

<param> 51CALCulate<prb>:CONVert:PARameter:VALue

<param>,<num> 52CALCulate<prb>:CONVert:SNUMber? 52CALCulate<prb>:CONVert:SNUMber <seri 52CALCulate<prb>:CONVert:TEST?

<res>|<mv>[,rjt] 52CALCulate<prb>:CONVert:UPDat 53CALCulate<prb>:CONVert:VERSion? 53CALCulate<prb>:CONVert:VERSion <num> 53CALibrate<chn>:DEVice:LOCK? 54CALibrate<chn>:DEVice:LOCK<bool 54CALibrate<chn>:DEVice:LOCK:DATA? 55CALibrate<chn>:DEVice:RANGe:CLEar 56CALibrate<chn>:DEVice:RANGe:SELection? 57CALibrate<chn>:DEVice:RANGe:SELection

<val> 58CALibrate:DEVice:AUTO? 54CALibrate:DEVice:AUTO <val> 54CALibrate:DEVice:RANGe:ADJust<num>? 55CALibrate:DEVice:RANGe:ADJust<num> <val

55CALibrate:DEVice:RANGe:NUMber? 56CALibrate:DEVice:RANGe:NUMber <val> 56CALibrate:DEVice:RANGe:REFerence<num>?

57CALibrate:DEVice:RANGe:REFerence<num>

<val 57Calibration 77Calibration and Setup Commands 45Calibration Equipment 77Calibration Parameters 82Calibration Process 81Calibration Range Identifiers 74Channel T1 Setup 30Channel T2 Setup 30

1529 Chub-E4 Thermometer Readout

100

Clamp-On Ferrites 4cleaning 97Commands, Calibration and Setup 45Commands, Data Logging 45Commands, Measurement 45Commands, Probe Setup 45Commands, Serial 48Commands, Status and Event 45Commands, System 45Contrast 33

DData Logging Commands 45Data Upload Format 41Date/Time 34Demand Log 35DEMAND LOG 39DISPlay<chn>:RESolution? 58DISPlay<chn>:RESolution <num 58Display Functions 29

EENTER 35error message 75Error Messages 75

FFast Scan Mod 33Fast Scan Mode 40, 81ferrite 4FETCh? <prb> 58

HHigh Ohms Range 87HI_OHMS Range 92HOLD 29HOME 38

IINFO-CON 24, 26Interval 37

LL75 Ohms Range 84L75_OHMS Range 91

LOG 37LOG Full 40LOGging:AUTomatic:DELete <num> 59LOGging:AUTomatic:FREE? 59LOGging:AUTomatic:LABel? 59LOGging:AUTomatic:LABel <num> 59LOGging:AUTomatic:POINt? 59LOGging:AUTomatic:PRINt <num> 60LOGging:AUTomatic:STATus? 60LOGging:AUTomatic:STATus <bool> 61LOGging:AUTomatic:TIMe? 61LOGging:AUTomatic:TIMe <rate> 61LOGging:AUTomatic:VALue? <num> 61LOGging:DEMand:DELete 62LOGging:DEMand:FREE? 62LOGging:DEMand:POINt? 62LOGging:DEMand:PRINt 62LOGging:DEMand:STATistic<n>? <num> 63LOGging:DEMand:VALue? <num> 63LOGging:LABel<n>:NAME? 64LOGging:LABel<n>:NAME <label> 64LOGS 39Lo Ohms Range 85LO_OHMS Range 92

MMaintenance 97Measurement Commands 45MEASure? <prb> 65Medium Ohms Range 86Menu, 1523 11Menu, 1524 14Millivolt Range 88, 92

NNEXT 36

PProbe 24Probe Lock 25Probe parameters 44Probe Setup Commands 45Probe wiring diagrams 27PRTs 24

101

Qquery commands 75

RREAD? <prb 65RECALL 35reference junction compensation 31Reference Junction Ohms Range 89RESET 36RS-232 43

SSafety Information 1SAVE 34SENSe:DATA:RJ? 66SENSe<prb>:DATA:MV? 65SENSe<prb>:DATA:OHMS? 65SENSe:RJ:STATe 66SENSe:RJ:TEMPerature? 66SENSe:RJ:TEMP <val> 66serial commands 90Serial Communication 80Serial Operation 44SETUP 30SHIFT 36Specifications 17Standard Equipment 1STATS 29Status and Event Commands 45STATus:MEASure:CONDition? 67STATus:MEASure:ENABle? 67STATus:MEASure:ENABle <num> 67STATus:MEASure:EVENt? 66STATus:QUEStionable:CONDition? 68STATus:QUEStionable:ENABle 68STATus:QUEStionable:ENABle <num 68STATus:QUEStionable:EVENt? 67Syntax, Command 44System Commands 45SYSTem:COMMunicate:SERial:BAUD? 68SYSTem:COMMunicate:SERial:BAUD <baud>

69SYSTem:COMMunicate:SERial:OFF 69SYSTem:DATE? 69SYSTem:DATE <year>,<month>,<day> 69

SYSTem:ERRor? 70SYSTem:PASSword:CDISable 70SYSTem:PASSword:CENable <pass> 70SYSTem:PASSword:CENable:STATe? 70SYSTem:PASSword:NEW <pass> 70SYSTem:SNUMber? 71SYSTem:TIME? 71SYSTem:TIME <hour>,<minute>,<second> 71SYSTem:VERSion? 71

TTag 38Thermistors 24Thermocouple 24TREND 36Troubleshooting 95

UUNIT:TEMPerature? 72UNIT:TEMPerature <unit> 72Unit Under Test 77User Interface 29

VVisual Inspection 82








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